Anniversary Calculator
Find the next anniversary date and days until it.
Tool workspace
Leave blank to use today.
Reference date defaults to today (browser local). Feb 29 anniversaries fall on Feb 28 in non-leap years.
How it works
Enter the original date and optional reference date (defaults to today). The tool finds the next anniversary and days remaining.
Feb 29 originals fall on Feb 28 in non-leap years. Empty original date clears the result—no error.
Feb 29 originals fall on Feb 28 in non-leap years. Empty original date clears the result—no error.
Examples
- Original date last year → next anniversary this/next year
- Feb 29 → Feb 28 when the target year is not a leap year
Privacy
Privacy: this tool processes dates locally in your browser. We do not log or store what you enter. Login is not required.
FAQ
How is Feb 29 handled?
In non-leap years the anniversary is treated as February 28.
Are my dates uploaded?
No. Calculation runs entirely in your browser.
Do I need an account?
No. All published tools work for guests without login.