Yom Kippur is recognized from sundown September 27 to sundown September 28

Yom Kippur is a day of atonement, reflecting on how to be a better person in the new year. It is not appropriate to say, “Happy Yom Kippur.” Yom Kippur is the holiest day on the Jewish calendar and is a day of atonement marked by fasting and ceremonial repentance. During this time, observant Jews abstain from food and drink and do not wash, apply lotions/creams and spend time in the synagogue