Hanukkah is a military battle, it was never celebrated. Most important Jewish Holidays are Yom Kippur , Rosh Hashnaah (which is usually in September) Second important holiday is Passover.
Rabbis got together in Europe in the 1880s and selected Hanukkah as a holiday to combat Christmas. They said Christmas was getting too much attention and wanted a holiday also.
Kwanzaa was started in the 1970s .