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The First Hanukkah
It was actually a Sukkot celebration.
BY NOAM ZION
In addition to the victory parades of the ancient Maccabees that celebrated their political independence, the original holiday also took the form of a Temple rededication ceremony.
In the Second Book of the Maccabees, which quotes from a letter sent circa 125 BCE from the Hasmoneans to the leaders of Egyptian Jewry, the holiday is called “The festival of Sukkot celebrated in the month of Kislev,” rather than Tishrei, which usually falls in September.
Since the Jews were still in caves fighting as guerrillas on Tishrei, 164 BCE, they could not properly honor the eight-day holiday of Sukkot (and Shemini Atzeret), which is a Temple holiday; hence it was postponed until after the recapture of Jerusalem and the purification of the Temple.