Anniversary Calculators
Whatever you are marking, these anniversary calculators measure the time since a meaningful date and count down to the next milestone.
The Anniversary Calculator is the general-purpose tool — enter any starting date to see how long it has been and when the next anniversary falls. From there the tools specialise. The Wedding Anniversary Calculator gives your anniversary number and traditional gift; the Relationship Length Calculator gives a running total of time together; the Work Anniversary Calculator counts years of service; and the Years in Business Calculator counts a company's years since founding.
There are tools for less obvious milestones too: Friendship Anniversary Calculator, Engagement Anniversary Calculator, and Sobriety Calculator — each phrased for the occasion it serves. All of them use the same careful date maths, so month-ends and leap years are handled correctly and the countdown to your next anniversary always lands on the right day. Prefer a live ticking countdown? The Anniversary Countdown counts down in real time, down to the second.
Enter a date and the answer appears instantly, computed privately in your browser.