📅 D-Day Calculator
Pick any date to see the D-Day countdown — how many days are left until an event, or how many days have passed since one. Great for exams, anniversaries and deadlines.
🔒 Runs 100% in your browser. Your data never leaves your device.
How to use
- Pick a target date.
- See the D-Day count instantly (D-Day, D-7, D+10…).
- It shows how many days remain, or how many have passed.
FAQ
What does D-Day mean?
D-Day is the target day. D-7 means 7 days before it; D+3 means 3 days after it.
Does it work for past dates?
Yes. Past dates show how many days have passed (D+N).
Is it free?
Yes, free with no sign-up.