how long do you fast for yom kippur

The fast for Yom Kippur lasts for about 25 hours. It begins at sundown on the evening before Yom Kippur and ends at sundown on the day of Yom Kippur itself. This extended 25-hour fast is observed to ensure the fast fully aligns with the day of observance. During this fast, no food or drink, including water, is consumed, reflecting the somber and spiritual nature of the Day of Atonement. Exceptions are made for those with medical conditions where fasting would be unsafe.