In fact, we used to have 13 months in a calendar year. So why is our calendar 12 months instead? And why did it change? According to the NCESC, there's a long history behind this alteration.

Everyone has a favorite season — or at least a season that they prefer the most. However, the calendar dates of seasons don’t ...

"When Numa Pompilius took reign [of Rome], he decided to make the calendar more accurate by lining it up with the year’s 12 lunar cycles," according to the Children's Museum of Indianapolis.