Aug 18, 2026Discover how many Sundays occurred in 1900, why it had 52 Sundays, and insights about the calendar for that year.

Aug 3, 2026Learn how to determine if February has 29 days by understanding the leap year rules, including century exceptions.

Aug 2, 2026Learn how to calculate leap years with easy rules: divisible by 4, and if divisible by 100, also divisible by 400. Examples included.

Mar 25, 2026Learn how to calculate the days in a calendar year, including how to identify leap years using divisibility rules.