In the very beginning of the Roman calendar (more than 2000 years ago), there were only 10 months in the year.
Jule Berlin/Shutterstock
December is named for the Roman word for “tenth”. So, why is it the twelfth month?
lassedesignen/Shutterstock
Since the middle ages, scholars have been saying that our dates might be out by decades.
Orthodox Easter in Syria.
EPA/BADAWI
Christian calendars usually differ when it comes to Easter celebrations – but not in 2017.