The calendar that we use in everyday life is the Gregorian Calendar, in which there are 365 days in most years, but 366 days in years that are divisible by 4 unless they are also divisible by 100 othe...The calendar that we use in everyday life is the Gregorian Calendar, in which there are 365 days in most years, but 366 days in years that are divisible by 4 unless they are also divisible by 100 other than those that are also divisible by 400. The Anomalistic Year is the interval between consecutive passages of the Earth through perihelion and is a little longer than the sidereal year.
