The Feast of Dedication was an eight-day Jewish festival beginning on the twenty-fifth of Kislev, or December. It commemorated the cleansing of the temple and the rededication of the altar after their desecration by Antiochus Epiphanes. The celebration was marked by mirth and gladness.
Jesus was present in the temple at Jerusalem during this winter feast, when He delivered the discourse recorded in John 10:24 and following. The festival is therefore a setting for His teaching in the temple.
The feast was instituted after Judas Maccabeus cleansed and rededicated the temple and altar. It was kept like the Feast of Tabernacles, with palm and other branches and the singing of psalms. Josephus called it “Lights” because of the accompanying joy.