Give up? Try 1899!
It will be another 76 years (2089) until this Rosh Hashanah comes this early again.
Rabbis everywhere are scrambling to finish sermons and Jews everywhere are asking, “has the Jewish calendar gone crazy!?”
Well, not exactly. In reality the Jewish calendar works on a 19 year cycle adding a 13th month (Adar 2) in years 3, 6, 8, 11, 14, 17 and 19. This is year 17 of that cycle and represents the longest possible year in the Jewish calendar of 385 days.
The Jewish calendar which is based primarily on the lunar cycle, makes these adjustments in order to keep the holidays in sync with with solar seasons. This keeps Passover in the spring and Sukkot in the autumn. Every four years the calendar adds a month during leap years for the holidays to be “early” or “late”, what is different this year is the extreme “earliness” in relation to the secular calendar.
The next time Rosh Hashanah will fall on September 5th will as mentioned above be in 2089 or in the Jewish counting 5850 which is why this year is so special.