Anniversary Calculator
Calculate upcoming anniversaries and milestones.
About this tool
The anniversary calculator counts the days since a meaningful date and lists upcoming day, month, and year milestones. Track relationship anniversaries, sobriety days, work-start dates, or any moment worth celebrating. The tool highlights round-number milestones (100, 200, 1000 days, etc.) within the next year.
How to use
- Pick the start date you want to commemorate.
- See the total number of days that have passed since that date.
- Browse the list of upcoming day, month, and year milestones.
- Note dates highlighted as "Today!" so you can celebrate them.
- Save the page as a bookmark for quick access throughout the year.
Common use cases
- Couples tracking dating, engagement, and wedding anniversaries.
- Counting sobriety days for personal health milestones.
- Marking the day you started a new job or business.
- Remembering loss and honoring memorial dates.
- Celebrating long friendships, pet adoptions, or moves.
Frequently asked questions
Q. Can I save multiple anniversaries?
A. Currently the tool computes one date at a time. Bookmark the page with the date filled in or store dates in your calendar app.
Q. Why are some milestones missing from the list?
A. Only milestones that fall within the upcoming year (or two years for yearly milestones) are shown to keep the list focused.
Q. Does it support lunar calendar dates?
A. No, the calculator works with the Gregorian calendar. Convert lunar dates first if needed.
Q. Why is the count off by one day sometimes?
A. Time zone differences and daylight-saving boundaries can cause a one-day shift around midnight.