The Jewish Holidays in July 2025

This date is associated with the breach of the walls of Jerusalem by the Romans in 70 AD and it initiates the three-week period of mourning leading up to Tisha b'Av9 (August 23, 2025).  

Prior to the fall of the Second Temple, the Fast of Tammuz was associated with the fall of the First Temple and is referenced in the Book of Zechariah, Zech 8:18-19, specifically: "And it came to pass, the word of the Lord of Hosts came to me, saying: 'Thus says the Lord of Hosts: A fast of the 4th [month]... will become for the House of Judah for happiness and for joy, and for good appointed times; and the truth and the peace they will love.'"  

Traditionally, the Fast of Tammuz is also associated with Moses' smashing the two tablets containing the 10 Commandments, when he saw the idolatry of the Hebrews around the golden calf.  

This is a minor fast,so it is not 24 hours.  It begins on the morning and ends on the evening, specifically on July 13 this year.