윤년 확인
Check if years are leap years. Supports multiple years at once. Runs entirely in your browser.
자주 묻는 질문
What is a leap year?
A year divisible by 4, except century years which must be divisible by 400.
Can I check multiple years?
Yes, enter one year per line.
Is my data safe?
Yes. All processing happens locally in your browser.
