Anniversary calculator: days together, 100 day anniversary.
dayLime's anniversary calculator is a free web tool that turns a start day into a day count and anniversary dates.
How many days since we got together?
Enter your start day and the calculator shows the day count so far, written as D+N.
When is my 100 day anniversary?
The list shows each hundred-day milestone from D+100 up to D+1000, with its date and the days left until it.
When is our first yearly anniversary?
A yearly anniversary falls on the same month and day in later years: one year, two years, three years and on.
What date falls N days after a start day?
Enter any day count and the calculator returns the date that many days after your start day.
How does the anniversary calculator count the days?
It uses the same two readings as the dayLime app. By default D+100 is the date 100 days after the start day. If you switch to Start at D+1, D+100 is the date 99 days after your start day, not 100. Yearly anniversaries do not depend on that choice.
Read the start day as
- D-Day
- D+1
- D+2
- D+3
- D+1
- D+2
- D+3
- D+4
What people ask about the anniversary calculator.
Is the start day D-Day or D+1?
You can choose. By default the start day reads D-Day and the next day D+1. Pick Start at D+1 under Display in the D-Day settings and the start day itself reads D+1, so a 100 day challenge begins at D+1. A third way, Count down to goal, counts the days left until your goal date.
How is the 100 day anniversary date worked out?
In the default reading D+100 is 100 days after your start day. Choose Start at D+1 and D+100 moves one day earlier, 99 days after the start. The start day reading above the list decides which one it uses.
When does a yearly anniversary fall?
It falls on the matching month and day one year later, two years later and so on. For a start day of 29 February, years without that date use 28 February.
Does it work for any number of days?
Yes. Type the days you want and the date appears, reading the start day the same way as the milestone list.
Does it show my next anniversary?
Yes. After you enter a date the list marks which milestones have passed and which are coming, and names the next one with the days left.
Does the calculator handle leap years?
Yes. It counts calendar dates, so 29 February is counted in a leap year. From 2024-02-28 to 2024-03-01 is 2 days, and from 2023-02-28 to 2023-03-01 is 1 day.
How many days have we been together?
Make the day you got together the start day of a slot and shoot. The stamp shows how many days it has been. On the web day counter the start day is D-Day by default, as in the app, and the Start at D+1 option makes it day 1.
Your anniversary on every photo.
First 2 slots free forever · iOS & Android