Leap Year Status and Details Calculator
Check if any given year is a leap year according to the Gregorian calendar rules and find detailed information.
Year 2027 is a...
COMMON YEAR
Total Days in Year
365
January 1st Falls On
Friday
Leap Year Rule Analysis:
The Rules of the Gregorian Calendar
A leap year is necessary because the Earth's orbit around the Sun takes approximately 365.2425 days, not precisely 365. The extra day every four years helps synchronize the calendar year with the astronomical year.
The Leap Year Rules (Divisibility Test)
A year is a leap year if it satisfies the following three conditions (the first condition met determines the result):
- **Rule 1 (Default):** The year is evenly divisible by 4.
- **Rule 2 (Exception):** If the year is also divisible by 100 (a centennial year), it is NOT a leap year...
- **Rule 3 (Super-Exception):** ...UNLESS the year is also divisible by 400. In that case, it IS a leap year.
**Examples:**
- **2024:** Divisible by 4, not by 100. **Leap Year.**
- **1900:** Divisible by 4 and 100, but not by 400. **Common Year.**
- **2000:** Divisible by 4, 100, and 400. **Leap Year.**