Anniversary & 100-Day Calculator
기념일 계산기 · 100일 계산기 · anniversary calculator · 커플 디데이 · 사귄 지
Anniversary & 100-Day Calculator
Enter a start date to see how many days it's been, plus 100-day and anniversary dates.
The start date counts as day 1 (Korean style); e.g. day 100 is 99 days after the start.
How to use
- 1
Pick a start date (e.g. the day you met).
- 2
See how many days it's been as of today.
- 3
Check the 100-day and anniversary dates and countdowns.
FAQ
Is this tool free?
Yes — it is completely free to use, with no account or sign-up required.
What is this tool?
Enter a start date — the day you met, a wedding anniversary, anything — and this tool shows how many days it's been as of today, plus the dates and countdown (D-day) for key milestones like 100, 200, and 1000 days and 1, 2, and more years. The start date counts as day 1 (Korean style), so day 100 is 99 days after the start. Everything is calculated in your browser, free with no install.