Hmmm, that is very confusing as one is saying THROUGH 11th, while other is saying THROUGH 12th. Through means through that entire date and ending at the start next day at server reset. So is it THROUGH 11th or THROUGH 12th ??? Is it Ending on reset on the 12th or on the 13th ???
In the Beacon it says:
The Harvestmath Festival has been extended by another week! This seasonal event now runs through November 11th.
Note the "THROUGH" there. That indicates it is active the whole of 11th and ends on server reset to the 12th, so why is Twitter (according to fatefoot) saying differently ???
I'd go with it ending one week after it was originally ending. That would mean the 12th at 3am Eastern.
There is a reason we asked for exact times rather than relying on "to" or "through". The wording always causes problems.
If you want to assume an extra day because of that word, just don't complain if you did not buy all the items you wanted to buy.