I'm sure I must've learned at some point in the past that January is the month of the two-faced god. Janus, the god of gateways, also represented for the Romans time.
There are actually four months of the year named after ancient gods: March (Mars), May (Maia), June (Juno) and of course, January.
I am awaiting a campaign, led by Glenn Beck or someone of his ilk, to rename these months after the four gospels. Or the four horsemen. After all, what self-respecting "Christian" nation still invokes the names of idols?