[Temporal] Add Plain(Date|MonthDay|YearMonth).*.to(Locale)?String

Spec Text:
https://tc39.es/proposal-temporal/#sup-temporal.plaindate.prototype.tostring
https://tc39.es/proposal-temporal/#sup-temporal.plaindate.prototype.tolocalestring
https://tc39.es/proposal-temporal/#sup-temporal.plainmonthday.prototype.tostring
https://tc39.es/proposal-temporal/#sup-temporal.plainmonthday.prototype.tolocalestring
https://tc39.es/proposal-temporal/#sup-temporal.plainyearmonth.prototype.tostring
https://tc39.es/proposal-temporal/#sup-temporal.plainyearmonth.prototype.tolocalestring

Implement toString/toLocaleString as non-intl version.

Because toString took options bag in Temporal, we cannot use the
same way how we handle Date.prototype.toLocaleString() for non-intl
build by just forwarding to it's toString implementation.
Change built-ins-defintions.h to always has built-ins for
*.toLocaleString , not just in intl build.
Change src/init/bootstrapper.cc away of the toLocaleString forward
to toString approach.

Implement the non-intl version of ToLocaleString in js-temporal-objects.cc for
Temporal.Plain(Date|YearMonth|MonthDay)


Bug: v8:11544
Change-Id: I202bcf28ef05ed03c337475300cfdfd18b52ffb3
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3656137Reviewed-by: Adam Klein <adamk@chromium.org>
Commit-Queue: Frank Tang <ftang@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80675}

src/builtins/builtins-definitions.h

@@ -1172,6 +1172,8 @@ namespace internal {
   CPP(TemporalPlainDatePrototypeToString)                                      \
   /* Temporal #sec-temporal.plaindate.prototype.tojson */                      \
   CPP(TemporalPlainDatePrototypeToJSON)                                        \
+  /* Temporal #sec-temporal.plaindate.prototype.tolocalestring */              \
+  CPP(TemporalPlainDatePrototypeToLocaleString)                                \
   /* Temporal #sec-temporal.plaindate.prototype.valueof */                     \
   CPP(TemporalPlainDatePrototypeValueOf)                                       \
                                                                                \
@@ -1220,6 +1222,8 @@ namespace internal {
   CPP(TemporalPlainTimePrototypeToString)                                      \
   /* Temporal #sec-temporal.plaindtimeprototype.tojson */                      \
   CPP(TemporalPlainTimePrototypeToJSON)                                        \
+  /* Temporal #sec-temporal.plaintime.prototype.tolocalestring */              \
+  CPP(TemporalPlainTimePrototypeToLocaleString)                                \
   /* Temporal #sec-temporal.plaintime.prototype.valueof */                     \
   CPP(TemporalPlainTimePrototypeValueOf)                                       \
                                                                                \
@@ -1292,6 +1296,8 @@ namespace internal {
   CPP(TemporalPlainDateTimePrototypeToString)                                  \
   /* Temporal #sec-temporal.plainddatetimeprototype.tojson */                  \
   CPP(TemporalPlainDateTimePrototypeToJSON)                                    \
+  /* Temporal #sec-temporal.plaindatetime.prototype.tolocalestring */          \
+  CPP(TemporalPlainDateTimePrototypeToLocaleString)                            \
   /* Temporal #sec-temporal.plaindatetime.prototype.valueof */                 \
   CPP(TemporalPlainDateTimePrototypeValueOf)                                   \
   /* Temporal #sec-temporal.plaindatetime.prototype.tozoneddatetime */         \
@@ -1394,6 +1400,8 @@ namespace internal {
   CPP(TemporalZonedDateTimePrototypeToString)                                  \
   /* Temporal #sec-temporal.zonedddatetimeprototype.tojson */                  \
   CPP(TemporalZonedDateTimePrototypeToJSON)                                    \
+  /* Temporal #sec-temporal.zoneddatetime.prototype.tolocalestring */          \
+  CPP(TemporalZonedDateTimePrototypeToLocaleString)                            \
   /* Temporal #sec-temporal.zoneddatetime.prototype.valueof */                 \
   CPP(TemporalZonedDateTimePrototypeValueOf)                                   \
   /* Temporal #sec-temporal.zoneddatetime.prototype.startofday */              \
@@ -1462,6 +1470,8 @@ namespace internal {
   CPP(TemporalDurationPrototypeToString)                                       \
   /* Temporal #sec-temporal.duration.tojson */                                 \
   CPP(TemporalDurationPrototypeToJSON)                                         \
+  /* Temporal #sec-temporal.duration.prototype.tolocalestring */               \
+  CPP(TemporalDurationPrototypeToLocaleString)                                 \
   /* Temporal #sec-temporal.duration.prototype.valueof */                      \
   CPP(TemporalDurationPrototypeValueOf)                                        \
                                                                                \
@@ -1504,6 +1514,8 @@ namespace internal {
   CPP(TemporalInstantPrototypeToString)                                        \
   /* Temporal #sec-temporal.instant.tojson */                                  \
   CPP(TemporalInstantPrototypeToJSON)                                          \
+  /* Temporal #sec-temporal.instant.prototype.tolocalestring */                \
+  CPP(TemporalInstantPrototypeToLocaleString)                                  \
   /* Temporal #sec-temporal.instant.prototype.valueof */                       \
   CPP(TemporalInstantPrototypeValueOf)                                         \
   /* Temporal #sec-temporal.instant.prototype.tozoneddatetime */               \
@@ -1550,6 +1562,8 @@ namespace internal {
   CPP(TemporalPlainYearMonthPrototypeToString)                                 \
   /* Temporal #sec-temporal.plainyearmonth.tojson */                           \
   CPP(TemporalPlainYearMonthPrototypeToJSON)                                   \
+  /* Temporal #sec-temporal.plainyearmonth.prototype.tolocalestring */         \
+  CPP(TemporalPlainYearMonthPrototypeToLocaleString)                           \
   /* Temporal #sec-temporal.plainyearmonth.prototype.valueof */                \
   CPP(TemporalPlainYearMonthPrototypeValueOf)                                  \
   /* Temporal #sec-temporal.plainyearmonth.prototype.toplaindate */            \
@@ -1578,6 +1592,8 @@ namespace internal {
   CPP(TemporalPlainMonthDayPrototypeToString)                                  \
   /* Temporal #sec-temporal.plainmonthday.tojson */                            \
   CPP(TemporalPlainMonthDayPrototypeToJSON)                                    \
+  /* Temporal #sec-temporal.plainmonthday.prototype.tolocalestring */          \
+  CPP(TemporalPlainMonthDayPrototypeToLocaleString)                            \
   /* Temporal #sec-temporal.plainmonthday.prototype.valueof */                 \
   CPP(TemporalPlainMonthDayPrototypeValueOf)                                   \
   /* Temporal #sec-temporal.plainmonthday.prototype.toplaindate */             \
@@ -1834,38 +1850,22 @@ namespace internal {
   CPP(TemporalCalendarPrototypeEra)                                    \
   /* Temporal #sec-temporal.calendar.prototype.erayear */              \
   CPP(TemporalCalendarPrototypeEraYear)                                \
-  /* Temporal #sec-temporal.duration.prototype.tolocalestring */       \
-  CPP(TemporalDurationPrototypeToLocaleString)                         \
-  /* Temporal #sec-temporal.instant.prototype.tolocalestring */        \
-  CPP(TemporalInstantPrototypeToLocaleString)                          \
   /* Temporal #sec-get-temporal.plaindate.prototype.era */             \
   CPP(TemporalPlainDatePrototypeEra)                                   \
   /* Temporal #sec-get-temporal.plaindate.prototype.erayear */         \
   CPP(TemporalPlainDatePrototypeEraYear)                               \
-  /* Temporal #sec-temporal.plaindate.prototype.tolocalestring */      \
-  CPP(TemporalPlainDatePrototypeToLocaleString)                        \
   /* Temporal #sec-get-temporal.plaindatetime.prototype.era */         \
   CPP(TemporalPlainDateTimePrototypeEra)                               \
   /* Temporal #sec-get-temporal.plaindatetime.prototype.erayear */     \
   CPP(TemporalPlainDateTimePrototypeEraYear)                           \
-  /* Temporal #sec-temporal.plaindatetime.prototype.tolocalestring */  \
-  CPP(TemporalPlainDateTimePrototypeToLocaleString)                    \
-  /* Temporal #sec-temporal.plainmonthday.prototype.tolocalestring */  \
-  CPP(TemporalPlainMonthDayPrototypeToLocaleString)                    \
-  /* Temporal #sec-temporal.plaintime.prototype.tolocalestring */      \
-  CPP(TemporalPlainTimePrototypeToLocaleString)                        \
   /* Temporal #sec-get-temporal.plainyearmonth.prototype.era */        \
   CPP(TemporalPlainYearMonthPrototypeEra)                              \
   /* Temporal #sec-get-temporal.plainyearmonth.prototype.erayear */    \
   CPP(TemporalPlainYearMonthPrototypeEraYear)                          \
-  /* Temporal #sec-temporal.plainyearmonth.prototype.tolocalestring */ \
-  CPP(TemporalPlainYearMonthPrototypeToLocaleString)                   \
   /* Temporal #sec-get-temporal.zoneddatetime.prototype.era */         \
   CPP(TemporalZonedDateTimePrototypeEra)                               \
   /* Temporal #sec-get-temporal.zoneddatetime.prototype.erayear */     \
   CPP(TemporalZonedDateTimePrototypeEraYear)                           \
-  /* Temporal #sec-temporal.zoneddatetime.prototype.tolocalestring */  \
-  CPP(TemporalZonedDateTimePrototypeToLocaleString)                    \
                                                                        \
   CPP(V8BreakIteratorConstructor)                                      \
   CPP(V8BreakIteratorInternalAdoptText)                                \

src/builtins/builtins-temporal.cc

@@ -60,8 +60,6 @@ TO_BE_IMPLEMENTED(TemporalPlainDatePrototypeEquals)
 TO_BE_IMPLEMENTED(TemporalPlainDatePrototypeToPlainDateTime)
 /* Temporal #sec-temporal.plaindate.prototype.tozoneddatetime */
 TO_BE_IMPLEMENTED(TemporalPlainDatePrototypeToZonedDateTime)
-/* Temporal #sec-temporal.plaindate.prototype.tostring */
-TO_BE_IMPLEMENTED(TemporalPlainDatePrototypeToString)
 
 /* Temporal.PlaneTime */
 /* Temporal #sec-temporal.plaintime.compare */
@@ -84,6 +82,8 @@ TO_BE_IMPLEMENTED(TemporalPlainTimePrototypeEquals)
 TO_BE_IMPLEMENTED(TemporalPlainTimePrototypeToPlainDateTime)
 /* Temporal #sec-temporal.plaintime.prototype.tozoneddatetime */
 TO_BE_IMPLEMENTED(TemporalPlainTimePrototypeToZonedDateTime)
+/* Temporal #sec-temporal.plaintime.prototype.tolocalestring */
+TO_BE_IMPLEMENTED(TemporalPlainTimePrototypeToLocaleString)
 /* Temporal #sec-temporal.plaintime.prototype.tostring */
 TO_BE_IMPLEMENTED(TemporalPlainTimePrototypeToString)
 /* Temporal #sec-temporal.plaindtimeprototype.tojson */
@@ -110,6 +110,8 @@ TO_BE_IMPLEMENTED(TemporalPlainDateTimePrototypeSince)
 TO_BE_IMPLEMENTED(TemporalPlainDateTimePrototypeRound)
 /* Temporal #sec-temporal.plaindatetime.prototype.equals */
 TO_BE_IMPLEMENTED(TemporalPlainDateTimePrototypeEquals)
+/* Temporal #sec-temporal.plaindatetime.prototype.tolocalestring */
+TO_BE_IMPLEMENTED(TemporalPlainDateTimePrototypeToLocaleString)
 /* Temporal #sec-temporal.plaindatetime.prototype.tostring */
 TO_BE_IMPLEMENTED(TemporalPlainDateTimePrototypeToString)
 /* Temporal #sec-temporal.plainddatetimeprototype.tojson */
@@ -202,6 +204,8 @@ TO_BE_IMPLEMENTED(TemporalDurationPrototypeSubtract)
 TO_BE_IMPLEMENTED(TemporalDurationPrototypeRound)
 /* Temporal #sec-temporal.duration.prototype.total */
 TO_BE_IMPLEMENTED(TemporalDurationPrototypeTotal)
+/* Temporal #sec-temporal.duration.prototype.tolocalestring */
+TO_BE_IMPLEMENTED(TemporalDurationPrototypeToLocaleString)
 /* Temporal #sec-temporal.duration.prototype.tostring */
 TO_BE_IMPLEMENTED(TemporalDurationPrototypeToString)
 /* Temporal #sec-temporal.duration.tojson */
@@ -222,6 +226,8 @@ TO_BE_IMPLEMENTED(TemporalInstantPrototypeSince)
 TO_BE_IMPLEMENTED(TemporalInstantPrototypeRound)
 /* Temporal #sec-temporal.instant.prototype.equals */
 TO_BE_IMPLEMENTED(TemporalInstantPrototypeEquals)
+/* Temporal #sec-temporal.instant.prototype.tolocalestring */
+TO_BE_IMPLEMENTED(TemporalInstantPrototypeToLocaleString)
 /* Temporal #sec-temporal.instant.prototype.tostring */
 TO_BE_IMPLEMENTED(TemporalInstantPrototypeToString)
 /* Temporal #sec-temporal.instant.tojson */
@@ -248,8 +254,6 @@ TO_BE_IMPLEMENTED(TemporalPlainYearMonthPrototypeUntil)
 TO_BE_IMPLEMENTED(TemporalPlainYearMonthPrototypeSince)
 /* Temporal #sec-temporal.plainyearmonth.prototype.equals */
 TO_BE_IMPLEMENTED(TemporalPlainYearMonthPrototypeEquals)
-/* Temporal #sec-temporal.plainyearmonth.tostring */
-TO_BE_IMPLEMENTED(TemporalPlainYearMonthPrototypeToString)
 /* Temporal #sec-temporal.plainyearmonth.prototype.toplaindate */
 TO_BE_IMPLEMENTED(TemporalPlainYearMonthPrototypeToPlainDate)
 
@@ -264,8 +268,6 @@ TO_BE_IMPLEMENTED(TemporalPlainMonthDayFrom)
 TO_BE_IMPLEMENTED(TemporalPlainMonthDayPrototypeWith)
 /* Temporal #sec-temporal.plainmonthday.prototype.equals */
 TO_BE_IMPLEMENTED(TemporalPlainMonthDayPrototypeEquals)
-/* Temporal #sec-temporal.plainmonthday.prototype.tostring */
-TO_BE_IMPLEMENTED(TemporalPlainMonthDayPrototypeToString)
 /* Temporal #sec-temporal.plainmonthday.prototype.toplaindate */
 TO_BE_IMPLEMENTED(TemporalPlainMonthDayPrototypeToPlainDate)
 
@@ -273,28 +275,14 @@ TO_BE_IMPLEMENTED(TemporalPlainMonthDayPrototypeToPlainDate)
 /* Temporal #sec-temporal.calendar.prototype.weekofyear */
 TO_BE_IMPLEMENTED(TemporalCalendarPrototypeWeekOfYear)
 
+/* Temporal.ZonedDateTime */
+/* Temporal #sec-temporal.zoneddatetime.prototype.tolocalestring */
+TO_BE_IMPLEMENTED(TemporalZonedDateTimePrototypeToLocaleString)
 #ifdef V8_INTL_SUPPORT
-/* Temporal */
-/* Temporal #sec-temporal.duration.prototype.tolocalestring */
-TO_BE_IMPLEMENTED(TemporalDurationPrototypeToLocaleString)
-/* Temporal #sec-temporal.instant.prototype.tolocalestring */
-TO_BE_IMPLEMENTED(TemporalInstantPrototypeToLocaleString)
-/* Temporal #sec-temporal.plaindate.prototype.tolocalestring */
-TO_BE_IMPLEMENTED(TemporalPlainDatePrototypeToLocaleString)
-/* Temporal #sec-temporal.plaindatetime.prototype.tolocalestring */
-TO_BE_IMPLEMENTED(TemporalPlainDateTimePrototypeToLocaleString)
-/* Temporal #sec-temporal.plainmonthday.prototype.tolocalestring */
-TO_BE_IMPLEMENTED(TemporalPlainMonthDayPrototypeToLocaleString)
-/* Temporal #sec-temporal.plaintime.prototype.tolocalestring */
-TO_BE_IMPLEMENTED(TemporalPlainTimePrototypeToLocaleString)
-/* Temporal #sec-temporal.plainyearmonth.prototype.tolocalestring */
-TO_BE_IMPLEMENTED(TemporalPlainYearMonthPrototypeToLocaleString)
 /* Temporal #sec-get-temporal.zoneddatetime.prototype.era */
 TO_BE_IMPLEMENTED(TemporalZonedDateTimePrototypeEra)
 /* Temporal #sec-get-temporal.zoneddatetime.prototype.erayear */
 TO_BE_IMPLEMENTED(TemporalZonedDateTimePrototypeEraYear)
-/* Temporal #sec-temporal.zoneddatetime.prototype.tolocalestring */
-TO_BE_IMPLEMENTED(TemporalZonedDateTimePrototypeToLocaleString)
 #endif  // V8_INTL_SUPPORT
 
 #define TEMPORAL_CONSTRUCTOR1(T)                                              \
@@ -491,6 +479,8 @@ TEMPORAL_PROTOTYPE_METHOD1(PlainDate, WithCalendar, withCalendar)
 TEMPORAL_PROTOTYPE_METHOD0(PlainDate, GetISOFields, getISOFields)
 TEMPORAL_VALUE_OF(PlainDate)
 TEMPORAL_PROTOTYPE_METHOD0(PlainDate, ToJSON, toJSON)
+TEMPORAL_PROTOTYPE_METHOD2(PlainDate, ToLocaleString, toLocaleString)
+TEMPORAL_PROTOTYPE_METHOD1(PlainDate, ToString, toString)
 
 // PlainTime
 BUILTIN(TemporalPlainTimeConstructor) {
@@ -580,7 +570,9 @@ TEMPORAL_GET_BY_INVOKE_CALENDAR_METHOD(PlainYearMonth, MonthsInYear,
 TEMPORAL_GET_BY_INVOKE_CALENDAR_METHOD(PlainYearMonth, InLeapYear, inLeapYear)
 TEMPORAL_PROTOTYPE_METHOD0(PlainYearMonth, GetISOFields, getISOFields)
 TEMPORAL_VALUE_OF(PlainYearMonth)
+TEMPORAL_PROTOTYPE_METHOD2(PlainYearMonth, ToLocaleString, toLocaleString)
 TEMPORAL_PROTOTYPE_METHOD0(PlainYearMonth, ToJSON, toJSON)
+TEMPORAL_PROTOTYPE_METHOD1(PlainYearMonth, ToString, toString)
 
 // PlainMonthDay
 BUILTIN(TemporalPlainMonthDayConstructor) {
@@ -599,6 +591,8 @@ TEMPORAL_GET_BY_FORWARD_CALENDAR(PlainMonthDay, Day, day)
 TEMPORAL_PROTOTYPE_METHOD0(PlainMonthDay, GetISOFields, getISOFields)
 TEMPORAL_VALUE_OF(PlainMonthDay)
 TEMPORAL_PROTOTYPE_METHOD0(PlainMonthDay, ToJSON, toJSON)
+TEMPORAL_PROTOTYPE_METHOD2(PlainMonthDay, ToLocaleString, toLocaleString)
+TEMPORAL_PROTOTYPE_METHOD1(PlainMonthDay, ToString, toString)
 
 // ZonedDateTime
 

src/init/bootstrapper.cc

@@ -4829,6 +4829,7 @@ void Genesis::InitializeGlobal_harmony_temporal() {
   V(since, Since, 1)                       \
   V(equals, Equals, 1)                     \
   V(getISOFields, GetISOFields, 0)         \
+  V(toLocaleString, ToLocaleString, 0)     \
   V(toPlainDateTime, ToPlainDateTime, 0)   \
   V(toZonedDateTime, ToZonedDateTime, 1)   \
   V(toString, ToString, 0)                 \
@@ -4841,20 +4842,6 @@ void Genesis::InitializeGlobal_harmony_temporal() {
     PLAIN_DATE_FUNC_LIST(INSTALL_PLAIN_DATE_FUNC)
 #undef PLAIN_DATE_FUNC_LIST
 #undef INSTALL_PLAIN_DATE_FUNC
-
-#ifdef V8_INTL_SUPPORT
-#define INSTALL_TO_LOCALE_STRING_FUNC(R)                                   \
-  SimpleInstallFunction(isolate(), prototype, "toLocaleString",            \
-                        Builtin::kTemporal##R##PrototypeToLocaleString, 0, \
-                        false);
-#else
-#define INSTALL_TO_LOCALE_STRING_FUNC(R)                        \
-  /* Install Intl fallback functions. */                        \
-  SimpleInstallFunction(isolate(), prototype, "toLocaleString", \
-                        Builtin::kTemporal##R##PrototypeToString, 0, false);
-#endif  // V8_INTL_SUPPORT
-
-    INSTALL_TO_LOCALE_STRING_FUNC(PlainDate)
   }
   {  // -- P l a i n T i m e
      // #sec-temporal-plaintime-objects
@@ -4891,6 +4878,7 @@ void Genesis::InitializeGlobal_harmony_temporal() {
   V(toPlainDateTime, ToPlainDateTime, 1) \
   V(toZonedDateTime, ToZonedDateTime, 1) \
   V(getISOFields, GetISOFields, 0)       \
+  V(toLocaleString, ToLocaleString, 0)   \
   V(toString, ToString, 0)               \
   V(toJSON, ToJSON, 0)                   \
   V(valueOf, ValueOf, 0)
@@ -4901,8 +4889,6 @@ void Genesis::InitializeGlobal_harmony_temporal() {
     PLAIN_TIME_FUNC_LIST(INSTALL_PLAIN_TIME_FUNC)
 #undef PLAIN_TIME_FUNC_LIST
 #undef INSTALL_PLAIN_TIME_FUNC
-
-    INSTALL_TO_LOCALE_STRING_FUNC(PlainTime)
   }
   {  // -- P l a i n D a t e T i m e
     // #sec-temporal-plaindatetime-objects
@@ -4961,6 +4947,7 @@ void Genesis::InitializeGlobal_harmony_temporal() {
   V(since, Since, 1)                       \
   V(round, Round, 1)                       \
   V(equals, Equals, 1)                     \
+  V(toLocaleString, ToLocaleString, 0)     \
   V(toJSON, ToJSON, 0)                     \
   V(toString, ToString, 0)                 \
   V(valueOf, ValueOf, 0)                   \
@@ -4978,8 +4965,6 @@ void Genesis::InitializeGlobal_harmony_temporal() {
     PLAIN_DATE_TIME_FUNC_LIST(INSTALL_PLAIN_DATE_TIME_FUNC)
 #undef PLAIN_DATE_TIME_FUNC_LIST
 #undef INSTALL_PLAIN_DATE_TIME_FUNC
-
-    INSTALL_TO_LOCALE_STRING_FUNC(PlainDateTime)
   }
   {  // -- Z o n e d D a t e T i m e
     // #sec-temporal-zoneddatetime-objects
@@ -5047,6 +5032,7 @@ void Genesis::InitializeGlobal_harmony_temporal() {
   V(since, Since, 1)                       \
   V(round, Round, 1)                       \
   V(equals, Equals, 1)                     \
+  V(toLocaleString, ToLocaleString, 0)     \
   V(toString, ToString, 0)                 \
   V(toJSON, ToJSON, 0)                     \
   V(valueOf, ValueOf, 0)                   \
@@ -5066,8 +5052,6 @@ void Genesis::InitializeGlobal_harmony_temporal() {
     ZONED_DATE_TIME_FUNC_LIST(INSTALL_ZONED_DATE_TIME_FUNC)
 #undef ZONED_DATE_TIME_FUNC_LIST
 #undef INSTALL_ZONED_DATE_TIME_FUNC
-
-    INSTALL_TO_LOCALE_STRING_FUNC(ZonedDateTime)
   }
   {  // -- D u r a t i o n
     // #sec-temporal-duration-objects
@@ -5106,6 +5090,7 @@ void Genesis::InitializeGlobal_harmony_temporal() {
   V(subtract, Subtract, 1)             \
   V(round, Round, 1)                   \
   V(total, Total, 1)                   \
+  V(toLocaleString, ToLocaleString, 0) \
   V(toString, ToString, 0)             \
   V(toJSON, ToJSON, 0)                 \
   V(valueOf, ValueOf, 0)
@@ -5116,8 +5101,6 @@ void Genesis::InitializeGlobal_harmony_temporal() {
     DURATION_FUNC_LIST(INSTALL_DURATION_FUNC)
 #undef DURATION_FUNC_LIST
 #undef INSTALL_DURATION_FUNC
-
-    INSTALL_TO_LOCALE_STRING_FUNC(Duration)
   }
   {  // -- I n s t a n t
     // #sec-temporal-instant-objects
@@ -5154,6 +5137,7 @@ void Genesis::InitializeGlobal_harmony_temporal() {
   V(since, Since, 1)                     \
   V(round, Round, 1)                     \
   V(equals, Equals, 1)                   \
+  V(toLocaleString, ToLocaleString, 0)   \
   V(toString, ToString, 0)               \
   V(toJSON, ToJSON, 0)                   \
   V(valueOf, ValueOf, 0)                 \
@@ -5166,8 +5150,6 @@ void Genesis::InitializeGlobal_harmony_temporal() {
     INSTANT_FUNC_LIST(INSTALL_INSTANT_FUNC)
 #undef INSTANT_FUNC_LIST
 #undef INSTALL_INSTANT_FUNC
-
-    INSTALL_TO_LOCALE_STRING_FUNC(Instant)
   }
   {  // -- P l a i n Y e a r M o n t h
     // #sec-temporal-plainyearmonth-objects
@@ -5211,6 +5193,7 @@ void Genesis::InitializeGlobal_harmony_temporal() {
   V(until, Until, 1)                   \
   V(since, Since, 1)                   \
   V(equals, Equals, 1)                 \
+  V(toLocaleString, ToLocaleString, 0) \
   V(toString, ToString, 0)             \
   V(toJSON, ToJSON, 0)                 \
   V(valueOf, ValueOf, 0)               \
@@ -5224,8 +5207,6 @@ void Genesis::InitializeGlobal_harmony_temporal() {
     PLAIN_YEAR_MONTH_FUNC_LIST(INSTALL_PLAIN_YEAR_MONTH_FUNC)
 #undef PLAIN_YEAR_MONTH_FUNC_LIST
 #undef INSTALL_PLAIN_YEAR_MONTH_FUNC
-
-    INSTALL_TO_LOCALE_STRING_FUNC(PlainYearMonth)
   }
   {  // -- P l a i n M o n t h D a y
     // #sec-temporal-plainmonthday-objects
@@ -5250,6 +5231,7 @@ void Genesis::InitializeGlobal_harmony_temporal() {
 #define PLAIN_MONTH_DAY_FUNC_LIST(V)   \
   V(with, With, 1)                     \
   V(equals, Equals, 1)                 \
+  V(toLocaleString, ToLocaleString, 0) \
   V(toString, ToString, 0)             \
   V(toJSON, ToJSON, 0)                 \
   V(valueOf, ValueOf, 0)               \
@@ -5263,10 +5245,7 @@ void Genesis::InitializeGlobal_harmony_temporal() {
     PLAIN_MONTH_DAY_FUNC_LIST(INSTALL_PLAIN_MONTH_DAY_FUNC)
 #undef PLAIN_MONTH_DAY_FUNC_LIST
 #undef INSTALL_PLAIN_MONTH_DAY_FUNC
-
-    INSTALL_TO_LOCALE_STRING_FUNC(PlainMonthDay)
   }
-#undef INSTALL_TO_LOCALE_STRING_FUNC
   {  // -- T i m e Z o n e
     // #sec-temporal-timezone-objects
     // #sec-temporal.timezone

src/objects/js-temporal-objects.cc

@@ -7504,7 +7504,63 @@ MaybeHandle<JSReceiver> JSTemporalPlainDate::GetISOFields(
 // #sec-temporal.plaindate.prototype.tojson
 MaybeHandle<String> JSTemporalPlainDate::ToJSON(
     Isolate* isolate, Handle<JSTemporalPlainDate> temporal_date) {
-  // #sec-temporal.plaindate.prototype.tolocalestring
+  // 1. Let temporalDate be the this value.
+  // 2. Perform ? RequireInternalSlot(temporalDate,
+  // [[InitializedTemporalDate]]).
+  // 3. Return ? TemporalDateToString(temporalDate, "auto").
+  return TemporalDateToString(isolate, temporal_date, ShowCalendar::kAuto);
+}
+
+namespace {
+
+// #sec-temporal-toshowcalendaroption
+Maybe<ShowCalendar> ToShowCalendarOption(Isolate* isolate,
+                                         Handle<JSReceiver> options,
+                                         const char* method) {
+  // 1. Return ? GetOption(normalizedOptions, "calendarName", « String », «
+  // "auto", "always", "never" », "auto").
+  return GetStringOption<ShowCalendar>(
+      isolate, options, "calendarName", method, {"auto", "always", "never"},
+      {ShowCalendar::kAuto, ShowCalendar::kAlways, ShowCalendar::kNever},
+      ShowCalendar::kAuto);
+}
+
+template <typename T,
+          MaybeHandle<String> (*F)(Isolate*, Handle<T>, ShowCalendar)>
+MaybeHandle<String> TemporalToString(Isolate* isolate, Handle<T> temporal,
+                                     Handle<Object> options_obj,
+                                     const char* method_name) {
+  // 1. Let temporalDate be the this value.
+  // 2. Perform ? RequireInternalSlot(temporalDate,
+  // [[InitializedTemporalDate]]).
+  // 3. Set options to ? GetOptionsObject(options).
+  Handle<JSReceiver> options;
+  ASSIGN_RETURN_ON_EXCEPTION(
+      isolate, options, GetOptionsObject(isolate, options_obj, method_name),
+      String);
+  // 4. Let showCalendar be ? ToShowCalendarOption(options).
+  ShowCalendar show_calendar;
+  MAYBE_ASSIGN_RETURN_ON_EXCEPTION_VALUE(
+      isolate, show_calendar,
+      ToShowCalendarOption(isolate, options, method_name), Handle<String>());
+  // 5. Return ? TemporalDateToString(temporalDate, showCalendar).
+  return F(isolate, temporal, show_calendar);
+}
+}  // namespace
+
+// #sec-temporal.plaindate.prototype.tostring
+MaybeHandle<String> JSTemporalPlainDate::ToString(
+    Isolate* isolate, Handle<JSTemporalPlainDate> temporal_date,
+    Handle<Object> options) {
+  return TemporalToString<JSTemporalPlainDate, TemporalDateToString>(
+      isolate, temporal_date, options, "Temporal.PlainDate.prototype.toString");
+}
+
+// #sup-temporal.plaindate.prototype.tolocalestring
+MaybeHandle<String> JSTemporalPlainDate::ToLocaleString(
+    Isolate* isolate, Handle<JSTemporalPlainDate> temporal_date,
+    Handle<Object> locales, Handle<Object> options) {
+  // TODO(ftang) Implement #sup-temporal.plaindate.prototype.tolocalestring
   return TemporalDateToString(isolate, temporal_date, ShowCalendar::kAuto);
 }
 
@@ -7978,6 +8034,22 @@ MaybeHandle<String> JSTemporalPlainMonthDay::ToJSON(
   return TemporalMonthDayToString(isolate, month_day, ShowCalendar::kAuto);
 }
 
+// #sec-temporal.plainmonthday.prototype.tostring
+MaybeHandle<String> JSTemporalPlainMonthDay::ToString(
+    Isolate* isolate, Handle<JSTemporalPlainMonthDay> month_day,
+    Handle<Object> options) {
+  return TemporalToString<JSTemporalPlainMonthDay, TemporalMonthDayToString>(
+      isolate, month_day, options, "Temporal.PlainMonthDay.prototype.toString");
+}
+
+// #sec-temporal.plainmonthday.prototype.tolocalestring
+MaybeHandle<String> JSTemporalPlainMonthDay::ToLocaleString(
+    Isolate* isolate, Handle<JSTemporalPlainMonthDay> month_day,
+    Handle<Object> locales, Handle<Object> options) {
+  // TODO(ftang) Implement #sup-temporal.plainmonthday.prototype.tolocalestring
+  return TemporalMonthDayToString(isolate, month_day, ShowCalendar::kAuto);
+}
+
 MaybeHandle<JSTemporalPlainYearMonth> JSTemporalPlainYearMonth::Constructor(
     Isolate* isolate, Handle<JSFunction> target, Handle<HeapObject> new_target,
     Handle<Object> iso_year_obj, Handle<Object> iso_month_obj,
@@ -8056,6 +8128,23 @@ MaybeHandle<String> JSTemporalPlainYearMonth::ToJSON(
   return TemporalYearMonthToString(isolate, year_month, ShowCalendar::kAuto);
 }
 
+// #sec-temporal.plainyearmonth.prototype.tostring
+MaybeHandle<String> JSTemporalPlainYearMonth::ToString(
+    Isolate* isolate, Handle<JSTemporalPlainYearMonth> year_month,
+    Handle<Object> options) {
+  return TemporalToString<JSTemporalPlainYearMonth, TemporalYearMonthToString>(
+      isolate, year_month, options,
+      "Temporal.PlainYearMonth.prototype.toString");
+}
+
+// #sec-temporal.plainyearmonth.prototype.tolocalestring
+MaybeHandle<String> JSTemporalPlainYearMonth::ToLocaleString(
+    Isolate* isolate, Handle<JSTemporalPlainYearMonth> year_month,
+    Handle<Object> locales, Handle<Object> options) {
+  // TODO(ftang) Implement #sup-temporal.plainyearmonth.prototype.tolocalestring
+  return TemporalYearMonthToString(isolate, year_month, ShowCalendar::kAuto);
+}
+
 // #sec-temporal-plaintime-constructor
 MaybeHandle<JSTemporalPlainTime> JSTemporalPlainTime::Constructor(
     Isolate* isolate, Handle<JSFunction> target, Handle<HeapObject> new_target,

src/objects/js-temporal-objects.h

@@ -138,14 +138,15 @@ class JSTemporalCalendar
       Handle<Object> temporal_date_like);
 
   // #sec-temporal.calendar.prototype.tostring
-  static MaybeHandle<String> ToString(Isolate* isolate,
-                                      Handle<JSTemporalCalendar> calendar,
+  V8_WARN_UNUSED_RESULT static MaybeHandle<String> ToString(
+      Isolate* isolate, Handle<JSTemporalCalendar> calendar,
       const char* method_name);
 
 #ifdef V8_INTL_SUPPORT
   V8_WARN_UNUSED_RESULT static MaybeHandle<Object> Era(
       Isolate* isolate, Handle<JSTemporalCalendar> calendar,
       Handle<Object> temporal_date_like);
+
   V8_WARN_UNUSED_RESULT static MaybeHandle<Object> EraYear(
       Isolate* isolate, Handle<JSTemporalCalendar> calendar,
       Handle<Object> temporal_date_like);
@@ -263,10 +264,20 @@ class JSTemporalPlainDate
   V8_WARN_UNUSED_RESULT static MaybeHandle<JSTemporalPlainDate> NowISO(
       Isolate* isolate, Handle<Object> temporal_time_zone_like);
 
+  // #sec-temporal.plaindate.prototype.tostring
+  V8_WARN_UNUSED_RESULT static MaybeHandle<String> ToString(
+      Isolate* isolate, Handle<JSTemporalPlainDate> plain_date,
+      Handle<Object> options);
+
   // #sec-temporal.plaindate.prototype.tojson
   V8_WARN_UNUSED_RESULT static MaybeHandle<String> ToJSON(
       Isolate* isolate, Handle<JSTemporalPlainDate> plain_date);
 
+  // #sec-temporal.plaindate.prototype.tolocalestring
+  V8_WARN_UNUSED_RESULT static MaybeHandle<String> ToLocaleString(
+      Isolate* isolate, Handle<JSTemporalPlainDate> plain_date,
+      Handle<Object> locales, Handle<Object> options);
+
   DECL_PRINTER(JSTemporalPlainDate)
 
   DEFINE_TORQUE_GENERATED_JS_TEMPORAL_YEAR_MONTH_DAY()
@@ -338,10 +349,20 @@ class JSTemporalPlainMonthDay
   V8_WARN_UNUSED_RESULT static MaybeHandle<JSReceiver> GetISOFields(
       Isolate* isolate, Handle<JSTemporalPlainMonthDay> month_day);
 
+  // #sec-temporal.plainmonthday.prototype.tostring
+  V8_WARN_UNUSED_RESULT static MaybeHandle<String> ToString(
+      Isolate* isolate, Handle<JSTemporalPlainMonthDay> month_day,
+      Handle<Object> options);
+
   // #sec-temporal.plainmonthday.prototype.tojson
   V8_WARN_UNUSED_RESULT static MaybeHandle<String> ToJSON(
       Isolate* isolate, Handle<JSTemporalPlainMonthDay> month_day);
 
+  // #sec-temporal.plainmonthday.prototype.tolocalestring
+  V8_WARN_UNUSED_RESULT static MaybeHandle<String> ToLocaleString(
+      Isolate* isolate, Handle<JSTemporalPlainMonthDay> plain_date,
+      Handle<Object> locales, Handle<Object> options);
+
   DECL_PRINTER(JSTemporalPlainMonthDay)
 
   DEFINE_TORQUE_GENERATED_JS_TEMPORAL_YEAR_MONTH_DAY()
@@ -398,10 +419,20 @@ class JSTemporalPlainYearMonth
   V8_WARN_UNUSED_RESULT static MaybeHandle<JSReceiver> GetISOFields(
       Isolate* isolate, Handle<JSTemporalPlainYearMonth> year_month);
 
+  // #sec-temporal.plainyearmonth.prototype.tostring
+  V8_WARN_UNUSED_RESULT static MaybeHandle<String> ToString(
+      Isolate* isolate, Handle<JSTemporalPlainYearMonth> year_month,
+      Handle<Object> options);
+
   // #sec-temporal.plainyearmonth.prototype.tojson
   V8_WARN_UNUSED_RESULT static MaybeHandle<String> ToJSON(
       Isolate* isolate, Handle<JSTemporalPlainYearMonth> year_month);
 
+  // #sec-temporal.plainyearmonth.prototype.tolocalestring
+  V8_WARN_UNUSED_RESULT static MaybeHandle<String> ToLocaleString(
+      Isolate* isolate, Handle<JSTemporalPlainYearMonth> plain_date,
+      Handle<Object> locales, Handle<Object> options);
+
   // Abstract Operations
 
   DECL_PRINTER(JSTemporalPlainYearMonth)

test/test262/test262.status

@@ -726,8 +726,6 @@
   'built-ins/Temporal/PlainDate/prototype/add/overflow-undefined': [FAIL],
   'built-ins/Temporal/PlainDate/prototype/add/overflow-wrong-type': [FAIL],
   'built-ins/Temporal/PlainDate/prototype/add/subclassing-ignored': [FAIL],
-  'built-ins/Temporal/PlainDate/prototype/dayOfWeek/basic': [FAIL],
-  'built-ins/Temporal/PlainDate/prototype/dayOfYear/basic': [FAIL],
   'built-ins/Temporal/PlainDate/prototype/equals/argument-object-invalid': [FAIL],
   'built-ins/Temporal/PlainDate/prototype/equals/argument-object-valid': [FAIL],
   'built-ins/Temporal/PlainDate/prototype/equals/argument-plaindatetime': [FAIL],
@@ -795,8 +793,6 @@
   'built-ins/Temporal/PlainDate/prototype/subtract/overflow-undefined': [FAIL],
   'built-ins/Temporal/PlainDate/prototype/subtract/overflow-wrong-type': [FAIL],
   'built-ins/Temporal/PlainDate/prototype/subtract/subclassing-ignored': [FAIL],
-  'built-ins/Temporal/PlainDate/prototype/toLocaleString/branding': [FAIL],
-  'built-ins/Temporal/PlainDate/prototype/toLocaleString/return-string': [FAIL],
   'built-ins/Temporal/PlainDate/prototype/toPlainDateTime/argument-string-with-utc-designator': [FAIL],
   'built-ins/Temporal/PlainDate/prototype/toPlainDateTime/argument-zoneddatetime-balance-negative-time-units': [FAIL],
   'built-ins/Temporal/PlainDate/prototype/toPlainDateTime/argument-zoneddatetime-negative-epochnanoseconds': [FAIL],
@@ -818,16 +814,6 @@
   'built-ins/Temporal/PlainDate/prototype/toPlainYearMonth/calendar-arguments': [FAIL],
   'built-ins/Temporal/PlainDate/prototype/toPlainYearMonth/calendar-fields-iterable': [FAIL],
   'built-ins/Temporal/PlainDate/prototype/toPlainYearMonth/calendar-yearmonthfromfields-called-with-options-undefined': [FAIL],
-  'built-ins/Temporal/PlainDate/prototype/toString/basic': [FAIL],
-  'built-ins/Temporal/PlainDate/prototype/toString/branding': [FAIL],
-  'built-ins/Temporal/PlainDate/prototype/toString/calendarname-always': [FAIL],
-  'built-ins/Temporal/PlainDate/prototype/toString/calendarname-auto': [FAIL],
-  'built-ins/Temporal/PlainDate/prototype/toString/calendarname-invalid-string': [FAIL],
-  'built-ins/Temporal/PlainDate/prototype/toString/calendarname-never': [FAIL],
-  'built-ins/Temporal/PlainDate/prototype/toString/calendarname-undefined': [FAIL],
-  'built-ins/Temporal/PlainDate/prototype/toString/calendarname-wrong-type': [FAIL],
-  'built-ins/Temporal/PlainDate/prototype/toString/options-undefined': [FAIL],
-  'built-ins/Temporal/PlainDate/prototype/toString/year-format': [FAIL],
   'built-ins/Temporal/PlainDate/prototype/toZonedDateTime/argument-string-with-utc-designator': [FAIL],
   'built-ins/Temporal/PlainDate/prototype/toZonedDateTime/argument-zoneddatetime-negative-epochnanoseconds': [FAIL],
   'built-ins/Temporal/PlainDate/prototype/toZonedDateTime/basic': [FAIL],
@@ -1155,7 +1141,6 @@
   'built-ins/Temporal/PlainMonthDay/prototype/equals/calendars': [FAIL],
   'built-ins/Temporal/PlainMonthDay/prototype/equals/calendar-temporal-object': [FAIL],
   'built-ins/Temporal/PlainMonthDay/prototype/equals/infinity-throws-rangeerror': [FAIL],
-  'built-ins/Temporal/PlainMonthDay/prototype/toLocaleString/branding': [FAIL],
   'built-ins/Temporal/PlainMonthDay/prototype/toPlainDate/argument-not-object': [FAIL],
   'built-ins/Temporal/PlainMonthDay/prototype/toPlainDate/branding': [FAIL],
   'built-ins/Temporal/PlainMonthDay/prototype/toPlainDate/calendar-fields-iterable': [FAIL],
@@ -1163,15 +1148,6 @@
   'built-ins/Temporal/PlainMonthDay/prototype/toPlainDate/copies-merge-fields-object': [FAIL],
   'built-ins/Temporal/PlainMonthDay/prototype/toPlainDate/infinity-throws-rangeerror': [FAIL],
   'built-ins/Temporal/PlainMonthDay/prototype/toPlainDate/limits': [FAIL],
-  'built-ins/Temporal/PlainMonthDay/prototype/toString/branding': [FAIL],
-  'built-ins/Temporal/PlainMonthDay/prototype/toString/calendarname-always': [FAIL],
-  'built-ins/Temporal/PlainMonthDay/prototype/toString/calendarname-auto': [FAIL],
-  'built-ins/Temporal/PlainMonthDay/prototype/toString/calendarname-invalid-string': [FAIL],
-  'built-ins/Temporal/PlainMonthDay/prototype/toString/calendarname-never': [FAIL],
-  'built-ins/Temporal/PlainMonthDay/prototype/toString/calendarname-undefined': [FAIL],
-  'built-ins/Temporal/PlainMonthDay/prototype/toString/calendarname-wrong-type': [FAIL],
-  'built-ins/Temporal/PlainMonthDay/prototype/toString/options-undefined': [FAIL],
-  'built-ins/Temporal/PlainMonthDay/prototype/toString/year-format': [FAIL],
   'built-ins/Temporal/PlainMonthDay/prototype/valueOf/basic': [FAIL],
   'built-ins/Temporal/PlainMonthDay/prototype/with/basic': [FAIL],
   'built-ins/Temporal/PlainMonthDay/prototype/with/branding': [FAIL],
@@ -1454,7 +1430,6 @@
   'built-ins/Temporal/PlainYearMonth/prototype/subtract/overflow-undefined': [FAIL],
   'built-ins/Temporal/PlainYearMonth/prototype/subtract/overflow-wrong-type': [FAIL],
   'built-ins/Temporal/PlainYearMonth/prototype/subtract/subclassing-ignored': [FAIL],
-  'built-ins/Temporal/PlainYearMonth/prototype/toLocaleString/branding': [FAIL],
   'built-ins/Temporal/PlainYearMonth/prototype/toPlainDate/argument-not-object': [FAIL],
   'built-ins/Temporal/PlainYearMonth/prototype/toPlainDate/branding': [FAIL],
   'built-ins/Temporal/PlainYearMonth/prototype/toPlainDate/calendar-fields-iterable': [FAIL],
@@ -1462,12 +1437,6 @@
   'built-ins/Temporal/PlainYearMonth/prototype/toPlainDate/copies-merge-fields-object': [FAIL],
   'built-ins/Temporal/PlainYearMonth/prototype/toPlainDate/infinity-throws-rangeerror': [FAIL],
   'built-ins/Temporal/PlainYearMonth/prototype/toPlainDate/limits': [FAIL],
-  'built-ins/Temporal/PlainYearMonth/prototype/toString/branding': [FAIL],
-  'built-ins/Temporal/PlainYearMonth/prototype/toString/calendarname-invalid-string': [FAIL],
-  'built-ins/Temporal/PlainYearMonth/prototype/toString/calendarname-undefined': [FAIL],
-  'built-ins/Temporal/PlainYearMonth/prototype/toString/calendarname-wrong-type': [FAIL],
-  'built-ins/Temporal/PlainYearMonth/prototype/toString/options-undefined': [FAIL],
-  'built-ins/Temporal/PlainYearMonth/prototype/toString/year-format': [FAIL],
   'built-ins/Temporal/PlainYearMonth/prototype/until/argument-string-with-utc-designator': [FAIL],
   'built-ins/Temporal/PlainYearMonth/prototype/until/branding': [FAIL],
   'built-ins/Temporal/PlainYearMonth/prototype/until/calendar-dateadd-called-with-plaindate-instance': [FAIL],
@@ -2246,9 +2215,6 @@
   'built-ins/Temporal/PlainYearMonth/prototype/subtract/month-length': [FAIL],
   'built-ins/Temporal/PlainYearMonth/prototype/subtract/options-invalid': [FAIL],
   'built-ins/Temporal/PlainYearMonth/prototype/toPlainDate/basic': [FAIL],
-  'built-ins/Temporal/PlainYearMonth/prototype/toString/calendarname-always': [FAIL],
-  'built-ins/Temporal/PlainYearMonth/prototype/toString/calendarname-auto': [FAIL],
-  'built-ins/Temporal/PlainYearMonth/prototype/toString/calendarname-never': [FAIL],
   'built-ins/Temporal/PlainYearMonth/prototype/until/argument-casting': [FAIL],
   'built-ins/Temporal/PlainYearMonth/prototype/until/arguments-missing-throws': [FAIL],
   'built-ins/Temporal/PlainYearMonth/prototype/until/largestunit-auto': [FAIL],
@@ -2401,7 +2367,6 @@
   'built-ins/Temporal/PlainDate/prototype/add/options-wrong-type': [FAIL],
   'built-ins/Temporal/PlainDate/prototype/since/options-wrong-type': [FAIL],
   'built-ins/Temporal/PlainDate/prototype/subtract/options-wrong-type': [FAIL],
-  'built-ins/Temporal/PlainDate/prototype/toString/options-wrong-type': [FAIL],
   'built-ins/Temporal/PlainDate/prototype/until/options-wrong-type': [FAIL],
   'built-ins/Temporal/PlainDate/prototype/with/options-wrong-type': [FAIL],
   'built-ins/Temporal/PlainDateTime/compare/calendar-ignored': [FAIL],
@@ -2481,7 +2446,6 @@
   'built-ins/Temporal/PlainDateTime/prototype/withPlainDate/argument-plaindate-calendar-same-id': [FAIL],
   'built-ins/Temporal/PlainDateTime/prototype/withPlainDate/argument-plaindate-calendar-same-object': [FAIL],
   'built-ins/Temporal/PlainMonthDay/from/options-wrong-type': [FAIL],
-  'built-ins/Temporal/PlainMonthDay/prototype/toString/options-wrong-type': [FAIL],
   'built-ins/Temporal/PlainMonthDay/prototype/with/options-wrong-type': [FAIL],
   'built-ins/Temporal/PlainTime/prototype/round/options-wrong-type': [FAIL],
   'built-ins/Temporal/PlainTime/prototype/round/roundto-invalid-string': [FAIL],
@@ -2493,7 +2457,6 @@
   'built-ins/Temporal/PlainYearMonth/prototype/add/options-wrong-type': [FAIL],
   'built-ins/Temporal/PlainYearMonth/prototype/since/options-wrong-type': [FAIL],
   'built-ins/Temporal/PlainYearMonth/prototype/subtract/options-wrong-type': [FAIL],
-  'built-ins/Temporal/PlainYearMonth/prototype/toString/options-wrong-type': [FAIL],
   'built-ins/Temporal/PlainYearMonth/prototype/until/options-wrong-type': [FAIL],
   'built-ins/Temporal/ZonedDateTime/from/options-wrong-type': [FAIL],
   'built-ins/Temporal/ZonedDateTime/prototype/add/options-wrong-type': [FAIL],