D-Day Calculator
Calculate days remaining until a target date, or find the date a set number of days from a starting date.
Fill in your details on the left and press Calculate to see your result here.
D-Day Calculator FAQ
Does the target date itself count toward D-day?
Yes. The target date itself is shown as D-DAY, the day before is D-1, and the day after is D+1.
Can I use this for anniversaries like a 100-day or 200-day milestone?
Yes. In 'Find a date by day count' mode, enter your starting date (such as the day you started dating) and a number of days (100, 200, etc.) to instantly see the exact date of that milestone.
What happens if I enter a target date in the past?
If the target date has already passed, the result is shown as D+n, indicating how many days have gone by since that date.
This calculator shows the calendar day difference for reference only.