When Is Rosh Hashanah 2025 Holiday. Rosh hashanah in 2025 will start on thursday, the 3rd of october (3/10/2025) and will continue for 2 days until friday, the 4th of october. The jewish year (5784, 5785, etc.) begins on rosh hashanah, and all holidays begin at sundown on the start date listed and end at sundown on the end date listed.
So when does rosh hashanah start in 2025? Rosh hashanah 2025, which ushers in the jewish year 5785, starts just before sundown on wednesday, oct.