When:
05/16/2021 – 05/18/2021 all-day
2021-05-16T00:00:00-04:00
2021-05-19T00:00:00-04:00

Shavuot begins at sundown on Sunday May 16 and runs through sundown, Monday, May 17 (or Tuesday, May 18, if you observe the second day).