Hanukkah is the rededication of the temple. 

Hanukkah is not actually a mo’edim, that is the appointed times of YHWH.  You can find the detailed list of mo’edim at Leviticus 23.

bible candle glasses

Though Hanukkah is not a mo’edim, it is not wrong to celebrate Hanukkah.  In the same way that others are not also obliged to celebrate Hanukkah.