When Does Kwanzaa Begin 2025 Calendar. Kwanzaa for the year 2025 is celebrated/ observed on thursday, december 26th. Kwanzaa for the year 2025 is celebrated/ observed on thursday, december 26th.

From thursday, december 26, 2025 to wednesday, january 1, 2025 from friday, december 26, 2025 to thursday, january 1, 2026 from saturday, december 26, 2026 to friday, january 1, 2027 Kwanzaa lasts from december 26 until january 1, and it is a week that values and celebrates african customs and culture.