The Tenth of Tevet is a minor fast day in the Jewish calendar, observed on the tenth day of the month of Tevet. It commemorates the beginning of the siege of Jerusalem by the Babylonian king Nebuchadnezzar in 588 BCE, which ultimately led to the destruction of the First Temple. This day serves as a reminder of the suffering and destruction faced by the Jewish people. On this day, Jews traditionally fast from dawn until nightfall, refraining from food and drink. The fast is one of four that are observed in connection with the destruction of the Temple and the subsequent exile of the Jewish people. It is a time for reflection and remembrance of historical tragedies.