calendar

A leap year birthday belongs to people born on February 29. Because the Gregorian calendar adds an extra day about once every four years to keep seasonal alignment, February 29...

In a common year with 365 days, half of the year is 182.5 days. Because you cannot have half a day in practice, the 183rd day is often treated as the middle of the year. In the...

There are 52 Sundays in the year 2026. This means there will also be 52 full weeks. The year begins on a Thursday, so the first Sunday is January 4, 2026, and the last Sunday is...