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When adding a promotion and clicking on the start date, the month displayed at the top of the calendar is incorrect.
Verified on master. Date shown is the 26th April, not May. Investigating.
I looked into this and couldn't figure it out. Suspect internal datepicker bug.
Make datepicker use correct month name
Clean up relateddayNames and dayNamesMin variables in admin.js.erb too
This was happening because the months were not having their initial nil/blank string removed from them. The above commit fixes this, and it is applied to 1-1-stable and master.
Thanks for letting us know @avitus!