mozilla-b2g/gaia — pull request #20766 by millermedeiros (2014-06-19 21:06:44+00:00)
Title: Bug 1027349 - [Calendar] month view week day names should be a single char r=gaye

created a different locale key instead of slicing the first char since I believe the slice wouldn't work well with all languages and would need custom JS logic to update the values every time the locale changed.