How often does february have 29 days

How often does an equinox fall on a leap day (February 29)? - Quora
The intercalendary day (February29th) was placed at the end of the year by the Romans and not near the either equinox. Note: February used to be the 12th month. Until the change in calendars.

Leap year - Wikipedia
February29 is a date that usually occurs every four years, and is called leap day. This day is added to the calendar in leap years as a corrective measure, because the Earth does not orbit the sun in precisely 365 days. The Gregorian calendar is a modification of the Julian calendar first used by the.

How Often Does February Last 29 Days?
This is why February lasts 29days once every 4 years. We have provided the answer to the question of how many days in February, and how long February lasts.