The Romans added January and February to the calendar but ran into a problem — math and superstition. Here's why February became the odd month out.

Under the ancient Roman calendar, the Ides referred to the full Moon of any month, which usually occurred between the 12th ...

Thank the Romans for that oddity. Before the Gregorian calendar used today, Roman King Numa Pompilius (715-673 BC) set about creating a way to sync the months with the lunar cycle. Doing that ...