Here are the possibilities:

1.   "At such an hour as ye think not" could mean anytime at all the Rapture can happen.  In this possibility the Rapture is not tied to any Jewish feasts.  Perhaps 

       the Rapture could be tied instead to a major escalation of the Russia / Ukraine war?   Maybe.   "Sudden destruction" down on earth does happen at the time of the Rapture.

2.   At yet another fall feast coming up------perhaps at the very end of the "10 days of awe" that we are in right now leading up to Yom Kippur------- at "Kol Nidre" right before Yom Kippur there is a "great trumpet blast" and the gates of Heaven close for the next year.   According to Jewish teaching the gates of Heaven are open between Rosh Hashanah and Kol Nidre.  That could be a very possible time for the Rapture!   In fact, an excellent possibility!   The "great trumpet blast" could be for the Rapture!

3.   We are at least yet again a year out for the Rapture and possibly longer.

Personally I like #2 above as our best chance for the Rapture remaining this year.   The orthodox Jewish people know about "Kol Nidre", but virtually no Christians know about this.   And extremely few Jewish people know about or believe that the Rapture is a real event.   So the Rapture would be a major surprise for virtually everyone!

Neil