100% free - No signup - Live countdown - Private in your browser
An anniversary calculator turns your relationship start date into a full timeline: exact years, months and days together, total days, upcoming round-number milestones (100, 500, 1000, 2000 days) and yearly anniversaries, plus a live ticking countdown to your next anniversary so you never miss the big day.
The day you met, started dating, got engaged or married - you choose what counts.
0 years, 0 months, 0 days
together and counting
Total days
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Total weeks
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It all started on a
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Next anniversary: -
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Live countdown - updates every second
Upcoming milestones
Frequently asked questions
Is the anniversary calculator free?
Yes. Calculate as many start dates as you like with no account, no limits and no watermarks. The countdown runs entirely in your browser.
What should I use as my start date?
Whatever feels right: the day you met, your first date, when you became official, your engagement or your wedding day. The calculator works with any meaningful date.
Is my start date stored or shared?
No. The date never leaves your device. There is no server, no account and no tracking of any kind.
Can I enter a future date?
No - the date picker is capped at today, and future dates show a friendly error. For counting down to a future wedding, try a countdown-style use of the milestones instead.
Does it handle leap years correctly?
Yes. All date math uses real calendar arithmetic, so February 29 start dates, leap years and varying month lengths are handled accurately.
How do I calculate how long I have been in a relationship?
Short answer: Short answer: enter your start date and the calculator subtracts it from today, giving you exact years, months and days together plus total days. It handles month lengths and leap years correctly, shows which weekday it all started on, and lists upcoming milestones like your 1000th day together with a live countdown to your next anniversary.
Your "start date" can be whatever matters to you: the day you met, your first date, or your wedding day. Many couples track several: run the calculator once per date and you will always know which anniversary is coming up next.
What milestones should couples celebrate?
Short answer: Short answer: beyond yearly anniversaries, couples love celebrating round-number day counts - 100 days, 500 days, 1000 days and 2000 days together - because they arrive as surprises between anniversaries. Monthly anniversaries ("monthiversaries") are popular in the first year, and many couples also mark the day they met or moved in together.
The calculator surfaces all of these automatically: day-count milestones up to 5000 days and your next three yearly anniversaries, each with its exact date and days remaining. Small milestones keep the romance alive between the big ones.
How does the anniversary countdown work?
Short answer: Short answer: the calculator finds your next anniversary by taking your start month and day in the current year (or next year if it already passed), then ticks down the difference in days, hours, minutes and seconds, updating every second. It uses your device clock, so the countdown stays accurate without any server or account.
Because the countdown is live, you can leave the tab open as the seconds melt away on the big day itself. If your anniversary is today, the milestone list marks it with a special "Today!" badge so you cannot miss it.
