When Is Hanukkah 2025 Start. Chanukah (hanukkah) 2025 starts at nightfall on december 25, 2025 and ends with nightfall on january 2, 2025, beginning on the hebrew calendar date of 25 kislev, and lasting for eight days. The hebrew calendar doesn't start on january 1 but instead starts in the fall.
In 2025, hanukkah begins at sundown on wednesday, december 25, and continues through thursday, january 2, 2025. Then the second day begins.
