When Is Rosh Hashanah 2027. Rosh hashana labehemot for hebrew year 5787 begins at sundown on thursday, 2 september 2027 and ends at nightfall on friday, 3 september 2027. How are rosh hashanah dates determined?
In 2027, rosh hashanah begins at sundown on friday, oct. 1 and ends at sundown on sunday, oct.