How many years does an anniversary celebrate?
The anniversary number equals the complete calendar years between the original date and that annual occurrence. The calculator also shows the next date and weekday.
Private date calculator
Anniversary calculator
Use any starting date to find the next annual anniversary and how many years it marks.
Anniversary calculator
Result
Details
- Accuracy note
This tool treats an anniversary as the same month and day each year. February 29 anniversaries use February 28 in non-leap years unless your own convention differs.
How to calculate an anniversary
- Enter the original wedding, relationship or event date.
- Choose the date from which you want to plan.
- See the next anniversary, completed years and remaining days.
Anniversary planning uses
- Check how many complete years an anniversary marks.
- Create a countdown or calendar reminder for the next occurrence.
Common questions
Can this calculate a work or business anniversary?
Yes. Any annual date can be used, including a wedding, relationship, employment start, business opening or personal milestone.
Are anniversary dates saved?
No. The original date and planning date stay in the current browser tab unless you deliberately create a separate countdown.