What Day Is Tisha B'Av 2025 Calendar. The fast of tisha b'av 2025 (the ninth of av) begins at sundown on august 12, 2025, and concludes at nightfall on august 13, 2025. Tisha b'av 2025 will begin in the evening of monday 12th aug, 2025 (12/08/2025) and ends in the nightfall of tuesday 13th aug, 2025 (13/08/2025).
In 2025, the year 5784 in the jewish calendar, tisha b’av (the 9th day of the jewish month of av), starts on the evening of monday, august 12 and ends on the evening of tuesday, august 13. Tisha b’av is the saddest day of the jewish year, commemorated by the most intense mourning practices of this.