The Festival of Hanukah commemorates the rededication of the Temple in Jerusalem after a group of Jewish warriors defeated the occupying Greek armies, about 150 years before Jesus’ birth.
Central to the celebrations is the story that the Temple menorah (seven-lamped candelabrum) miraculously burned for over a week – even though they thought the had only one day’s worth of ritually pure oil left.
They used the extra week to purify themselves and were therefore able to maintain the sacred space.
I recommend watching the following video of Founded In Truth’s YouTube channel if you want to know whether Christians should celebrate Hanukkah:
Happy Hanukah to everyone who celebrates it!