When Does Yom Kippur Start 2024 Schrikkeljaar. Yom kippur, or the day of atonement, is the holiest and most important day of the year in judaism. In 2023, yom kippur began at sunset on.

11, and end the evening of saturday, oct. יוֹם כִּפּוּר or יום הכיפורים ), also known as.