Question

why there are 366 days in a leap year

Answer 1

Leap day happens every 4 years because Earth completes one revolution around the sun in around 365 days and 6 hours. Over a period of 4 years, the extra 6 hours from every year get added up to become an entire day (6*4=24 hours). Hence, we have a leap day/leap year every 4 years.

The month of February is a wee bit different from other months in the sense that every years, out of nowhere, a 29th day is added to it, and the month of February becomes one day longer than usual!....

Answer 2

A leap year, where an extra day is added to the end of February every four years, is down to the Gregorian calendar's disparity with the solar system. A complete orbit of the earth around the sun takes exactly 365.2422 days to complete, but the Gregorian calendar uses 365days.Mar 1, 2016