
There are 365.2422 days in a Solar year. The average Gregorian calendar year has 365.2425 days. There is a 0.0003 day difference between the Gregorian and the Solar years. For this reason the Gregorian calendar will advance 1 day every 3,333 years.
There are 365.2422 days in a Solar year. The average Gregorian calendar year has 365.2425 days. There is a 0.0003 day difference between the Gregorian and the Solar years. For this reason the Gregorian calendar will advance 1 day every 3,333 years.