Photo: The painting is a detail of “Jews Praying in the Synagogue on Yom Kippur” by the 22-year-old Maurycy Gottlieb c. 1878.

Yom Kippur, also known as Day of Atonement, is the holiest day of the year for the Jews.

Yom Kippur begins at sundown on Tuesday, Oct. 8.

The day’s central themes are atonement and repentance. Jews traditionally observe this holy day with a 24-hour period of fasting and intensive prayer, often spending most of the day in synagogue services. Yom Kippur completes the annual period known in Judaism as the High Holy Days or sometimes the Days of Awe.

Belmont schools have advised teachers to should be aware of the holiday when assigning homework and tests as students will be attending religious services. In addition, Belmont High athletics joins many school districts in suspending games for the two days of the holiday’s observance.