📅 D-Day Calculator
Count down to any future event or count days since a past date. Track exams, birthdays, anniversaries, and more.
Add a date above to start tracking.
🔢 Days Between Two Dates
Difference
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❓ FAQ
D-Day originally referred to the day of a military operation. It is now commonly used to indicate any target or deadline date. D-1 means 1 day before the event, D+1 means 1 day after.
Yes. JavaScript's built-in Date object automatically handles leap years and February 29th when calculating date differences.
Yes, your countdowns are saved in your browser's localStorage. They persist across page refreshes but are cleared if you clear your browser data or use a different device.
Today (the start date) is not included in the countdown. The counter shows the number of full days remaining until the target date.
Yes, you can add as many events as you like. All events are displayed as cards sorted by the order you added them.