Máy tính kiểm tra năm nhuận

Overview

Leap Year Checker is a Time tool. Check any year with Gregorian rules showing February days and nearby leap years for learning and calendar, with one-click copy and offline. It runs 100% in your browser with no upload, so you get instant results with privacy. Whether you need a quick answer or batch processing with precise control, you can enter, validate and export in seconds. The UI is responsive on mobile, tablet and desktop and supports one-click copy.

Use cases

• Daily use of Leap Year Checker: Enter a year to see if it is a leap year, February length, total days and nearby leap years. — enter and get instant results without manual lookup.
• One-click copy keeps results ready to save, check or share with family and pros.
• Use Leap Year Checker offline or on poor network — all calculations stay local and private.
• Birthday and lunar reminders
• Exact age and total days

How to use

1. 1 Enter a year to see if it is a leap year, February length, total days and nearby leap years..
2. 2 Toggle inclusive and workdays
3. 3 View weeks/months/hours breakdown
4. 4 Copy or add to calendar

Highlights

• Local & private: processing stays in your browser
• Live validation with tolerant parsing
• One-click copy and export for docs, code or sheets
• Batch and offline support under poor network

Notes

• Workdays need holiday data
• Feb 29 birthdays vary by locale
• Seconds vs milliseconds timestamps

FAQ