caldays
Anniversary calculator

How long have you been together?

Pick any date — wedding, birthday, first day at a job, when you met. We calculate exactly how long ago that was in years, months, weeks, days, hours, and minutes. Plus upcoming milestone dates.

Anniversary date

Frequently asked questions

What dates should I track here?
Anything meaningful — wedding anniversaries, birthdays, when you met your partner, your first day at work, sobriety date, when you adopted your pet, when you moved to your country.
Why are dates in UTC?
For consistency. Time zones don't matter much for anniversary tracking — but if you want hour-precise timing in your local TZ, use our /date-calc page.
How are years counted?
Calendar years (not 365.25 days). 1 year = same date next year.
What's the longest milestone you show?
Up to 100 years and 10,000 days.

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Anniversary
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