Josephus on the Origin of Hanukkah

And so Judah [Maccabee] together with his fellow citizens celebrated the restoration of sacrifices in the Temple for eight days, omitting no form of pleasure but feasting them on costly and splendid sacrifices, and while honoring God with songs of praise and the playing of harps, at the same time delighted them. So much pleasure did they find in the renewal of their customs and in unexpectedly obtaining the right to have their own service after so long a time, that they made a law that their descendants should celebrate the restoration of the Temple for eight days. And from that time until now we celebrate this festival and call it the Festival of Lights. I suppose the reason was that this liberty to worship, which was beyond our hopes, suddenly appeared to us, and this name was given to the festival.