Where Did the Term “Leap Year” For Every Fourth Year Come From and How Long is a Leap Year?

A leap year has 366 days, with an extra day added to February.

Every year divisible by four is a leap year except those completing a century, which must be divisible by four hundred.

It’s called a leap year because normally the date that falls on a Monday this year will fall on Tuesday next year and then Wednesday the year after that.

In the fourth year it will “leap” over Thursday and fall on Friday.