A leap year occurs every four years, adding an extra day (February 29) to the calendar. The next leap year is 2024.
The Gregorian calendar, used worldwide, adds a leap day to synchronize with Earth's revolutions around the sun. A solar year is about 365.2422 days long, so skipping leap years would drift the calendar by roughly 6 hours per year.
Leap years follow a predictable pattern:
| Year Type | Example |
|---|---|
| Leap Year | 2024, 2028, 2032 |
| Common Year | 2023, 2025, 2027 |
| Century Year Exception | 1900 (not a leap year), 2100 (not a leap year) |
Century years divisible by 100 are only leap years if they're also divisible by 400. For example, 2000 was a leap year, but 1900 was not.
Leap years prevent seasonal drift. Without them, summer would eventually occur in December. The system was introduced by Julius Caesar and refined by Pope Gregory XIII in 1582.
Some believe leap years always add an extra day to February, but the Gregorian calendar also adjusts other months in non-leap years. Another myth is that leap years cause natural disasters, which is false.
The next leap year after 2024 is 2028. The cycle continues indefinitely, ensuring our calendar stays aligned with Earth's orbit.