MultiKit

Countdown Timer to a Date: D-Day, Days, Hours, Minutes, Seconds

  • Free
  • No sign-up
  • Runs in your browser
  • Version 1.0.1
  • Last updated 2026-10-25
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Set a date and time, give it a title if you like, and watch a live countdown in days, hours, minutes and seconds, with the D-day count (D-7, D-DAY, D+3) underneath. Share a link so someone else sees the same countdown.

The countdown runs on your device's own clock and in your local time zone. If you share the link with someone in another time zone, their countdown reaches zero at the same moment as yours, since the target time is carried in the link as an exact instant.

Everything you enter is processed in your browser and is never sent to a server.

How to use

  1. Enter the date and time to count down to, and, if you like, a short title such as a name or an occasion.
  2. Read the countdown: the big numbers are days, hours, minutes and seconds left, and the line above gives the D-day count.
  3. Press Copy a link to this countdown to share it; opening the link shows the same target moment and title.
  4. Once the moment passes, the page keeps counting, now showing the time since, and the D-day count turns to D+1, D+2 and so on.

Examples

7 days from now
→ D-7, then counting down 6 days 23:59:59 and onward
The D-day count is by calendar date, so it changes at midnight, not 24 hours later.
The moment itself
→ D-DAY, It's here!
Shown for the rest of that calendar day.
A date that has passed
→ D+3, counting the time since
The countdown does not stop at zero; it keeps going as a count-up.

How it works

The date and time you enter are read as your device’s own local time and turned into one exact moment. The countdown (or count-up, once it has passed) is that moment minus now, split into whole days, hours, minutes and seconds. The D-day count is separate: it compares calendar dates only, using date-fns, so it moves at midnight regardless of what time of day the target is.

A shared link carries the exact moment as a single number, the count of milliseconds since 1970, and the title you typed, so it does not depend on time zone at all: everyone who opens it counts down to the same instant. The countdown and the D-day label are covered by tests.

Sources

Frequently asked questions

What is a D-day count?
A way of naming the days before and after an event by calendar date: D-1 is the day before, D-DAY is the day itself, and D+1 is the day after, common in Korea for exams, weddings and releases. It changes at midnight in your time zone, unlike the hours:minutes:seconds countdown, which changes continuously.
Is the countdown in my time zone?
Yes, in your device's own time zone. A shared link still reaches zero at the same instant for everyone, since the link carries the exact moment, not a time of day to be read locally.
Can I use it for a repeating date, like a birthday?
Type next year's date once this year's has passed. There is no automatic yearly repeat, so that the page does only one thing plainly: count down to one moment you choose.
Does it keep running if I close the tab?
No. It is a page you keep open, not a reminder service; it does not notify you when the time comes.
Is anything sent to a server?
No. Everything is worked out in your browser, and the shared link only carries what is in its own address.
Version history
  • 1.0.1 — Clarifies the search title with the tool's main task and whether it is free or runs online.
  • 1.0.0 — First release.

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