About this tool
A couple anniversary list takes the day you started dating (or became friends, or got married) and turns it into every milestone you might want to celebrate: day 100, day 200, day 300, all the way to day 3000, plus the yearly anniversaries from year 1 to year 10.
Each line shows the date, the weekday and a D-day number, and the next milestone is highlighted at the top with how many days you have been together. How does it work?
You pick the start date once, and it is saved in your browser only. The page adds 100, 200, 300 days and so on to that date and compares each result with today's date on your device.
There is one rule worth knowing about the Korean way of counting: many couples treat the start date as day 1, not day 0. With the Korean-style box ticked, day 100 is the start date plus 99 days.
Untick the box if you prefer to count the start date as day 0, and day 100 becomes start plus 100 days.
Yearly anniversaries use the same month and day in later years, and a February 29 start falls on February 28 in years without a leap day.
By default the page shows only the next six milestones so the screen stays tidy; one button opens the full list, including the ones you have already passed, and another copies the whole list so you can paste it into your calendar or chat.
Under the list there is a small daily idea such as writing the story of how you met in three lines, planning a simple date at home or recording a ten-second voice message.
The pool has thirty ideas and six twists, giving 180 combinations before one repeats. Q: Does it work for friends or a wedding date? A: Yes, any start date works, for example a best-friend day or a wedding day.
Q: Is my date uploaded? A: No. It stays on your device and you can delete it with one button. Q: Why do other apps show a different date?
A: Some apps count the start date as day 0 and some as day 1, so check the box to match what you use. Q: Can I share? A: The share button sends a line like "Our next anniversary is D-12!" without any private date.
This tool is for fun and personal records. It is not relationship advice, and it does not know about your local holidays or events, so double-check dates for bookings.
How to use
- Pick the day you started dating (or any start date), and keep the Korean-style box ticked if you count that day as day 1.
- Read the highlighted next milestone and the next six dates; open the full list to see every 100-day step to 3000 days.
- Copy the list into your calendar, share the next D-day with your partner, and come back to see how your days together add up.