Sabbath starts at sunset on the 30th until sunset of whenever the first sliver of the new moon is sighted.
Exodus 31:13
Say to the children of Israel that they are to keep my Sabbaths; for the Sabbath day is a sign between me and you through all your generations; so that you may see that I am the Lord who makes you holy.
Hanukkah Continues on the Biblical Lunar Calendar!
The extra-Biblical book of Maccabees says…
Maccabees 4:59
Then Judas and his brothers and all the assembly of Israel determined that every year at that season the days of the dedication of the altar should be observed with gladness and joy for eight days, beginning with the twenty-fifth day of the month of Chislev. (Ninth Month)