Some weeks, writing snippets on Monday just doesn't happen. And during
those weeks, doing date arithmetic then correctly formatting a U.S.
date is too hard.

R=szager@chromium.org, deymo@chromium.org

Review URL: https://codereview.chromium.org/230823003

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@262723 0039d316-1c4b-4281-b951-d872f2087c98