Use this free D-Day calculator to count the days until a future date, or the days since a past date.
How to use this D-Day calculator
Select your target date and press Calculate D-Day. Future dates show as D minus the days remaining, past dates show as D plus the days passed, and today shows as D-Day.
Common uses
Count down to exams, weddings, trips, product launches, anniversaries, and deadlines.
Example
If today is 1 January and your exam is 11 January, the result is D-10.
Frequently asked questions
What does D-Day mean?
D-Day marks the target day itself. D-10 means 10 days remain, and D+10 means 10 days have passed.
Is today counted?
The countdown uses whole calendar days from today to the target date.