Leap Year Calculator - Check Any Year & List Leap Years Leap Year Calculator

What is a Leap Year?

A leap year is a calendar year that contains an additional day — February 29 — making it 366 days long instead of the usual 365. Leap years are needed to keep the calendar aligned with the Earth's orbit around the Sun, which takes approximately 365.2422 days.

Leap Year Rules

• Rule 1: If a year is divisible by 4, it is a leap year.
• Rule 2: However, if the year is also divisible by 100, it is NOT a leap year.
• Rule 3: Unless the year is also divisible by 400 — then it IS a leap year.

Examples: 2024 → Leap (÷4 ✓). 1900 → Not leap (÷100 but not ÷400). 2000 → Leap (÷400 ✓).

Features

• Year Check: Instantly check if any year from 1 to 9999 is a leap year.
• Range List: List all leap years between any two years.
• Rule Breakdown: See which divisibility rules apply to the checked year.
• Previous & Next: Find the previous and next leap years from any year.
• Feb 29 Day: See what day of the week February 29 falls on for each leap year.

How It Works

1. Enter Year: Type the year you want to check.
2. Set Range: Optionally set a start and end year to list leap years.
3. View Results: See if the year is a leap year, plus the previous and next leap years.
4. Leap Year Table: Browse all leap years in your selected range.