how long is the yom kippur fast

The Yom Kippur fast lasts approximately 25 hours. It begins at sundown on the eve of Yom Kippur and ends at sundown the following day. This extended period allows a cushion for the exact timing of nightfall to ensure the fast aligns with the date of Yom Kippur. During this fast, observers abstain from all food and drink as part of the day's solemn observance of repentance and atonement.