I went to use the one from the last quarter very late on the 31st (like I have done in the past with no issues), and from the time I copied it until I went to check out, it told me it was no longer valid. Went back to look for it and it was gone. So it sounds like they disabled and removed the code way before 11:59pm. Might have some issues with their timing at HQ ending early and starting late.
