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.

wow my birthday fell on friday the thirteenth of january wow