Leap Year Checker

How to Use the Leap Year Checker

1. Enter a Year

• Type any year in the input field (e.g., 2024)

• Supports years from 1 AD onward

2. Check the Result

• Click the “Check Year” button

• Immediate visual feedback:

  • ✅ Green: Leap year

  • ❌ Red: Not a leap year

3. Understand the Rules

A year is a leap year if:

• Divisible by 4 but not by 100

• OR divisible by 400

💡 Examples to Try

✔ Leap Years: 2000, 2020, 2024
✔ Non-Leap Years: 1900, 2021, 2100

🛠️ Technical Notes

• Works for all valid years (1 AD and beyond)

• No data leaves your browser – calculations happen locally

• Mobile-friendly design works on all devices

Why Check Leap Years?

• Programming date calculations

• Calendar app development

• Historical research

• School math projects