How to use
- Enter a start date, or leave it blank to use today.
- Enter the target date you want to count down to.
- Click "Calculate" to see the result.
How it works
The calculator finds the number of calendar days between the start date and the target date. If the target is in the future you get a "D-" countdown; if it has passed you get a "D+" count.
Examples
Start date today, target date 10 days from now → Result: "D-10"
Start date today, target date 5 days ago → Result: "D+5"
FAQ
What if the start and target date are the same?
You'll see "Today is D-Day".
Can I use a past target date?
Yes, the calculator will show how many days have passed since that date.