There was great joy among the people now that the disgrace of the Gentiles was removed. Then Judas and his brothers and the entire congregation of Israel
decreed that the days of the dedication of the altar should be observed with joy and gladness on the anniversary every year for eight days, from the twenty-fifth day of the month Chislev. (1 Mc 4:36-37,52-59)
https://bible.usccb.org/bible/readings/111921.cfm
The anniversary of the dedication of the altar in the Temple in Jerusalem is remembered in the Jewish feast of Hanukkah. This year Hanukkah will be celebrated from November 28-December 6.