Anniversary Calculator
Free anniversary calculators for couple days together, 100/200/1000 days, anniversary D-day, and wedding anniversary names like silver and golden anniversaries.
This is a free collection of anniversary calculators that run instantly in your browser with no sign-up or install, covering couple 100/1000 days, anniversary D-day, and wedding anniversary years.
All calculations happen in your browser, and the dates you enter are never sent to or stored on a server.
Anniversary calculators
Couple Anniversary Calculator
Enter the day you first met to instantly see your 100, 200, and 1000 day dates and how many days you have been together.
Anniversary D-day Calculator
Enter a target date to count how many days remain until it or how many have passed since, as a D-day.
Wedding Anniversary Calculator
Enter your wedding date to see which anniversary year you are on and its traditional name, like the silver or golden anniversary.
Anniversary guides
Why use Anniversary Calculator
- Free, no install — Use it straight from your browser with no sign-up or app download.
- No personal data — Every calculation runs in your browser and the dates you enter are never sent to a server.
- Accurate date counting — Counting rules such as whether the first day is included are stated clearly and shown in a table.
- Fun and memorable — Plan ahead for 100 days, 1000 days, and wedding anniversaries so you never miss a special date.
Anniversary date counting can differ by a day depending on whether the first day is counted, so check the rule noted on each calculator. Results are for fun and reference.
Last updated: 2026-06-25