Countdown to a Date

A countdown always recomputed from the clock, with no accumulated lag.

The countdown compares the event instant with your device clock every second and shows the difference in days, hours, minutes and seconds. Because the remaining time is always recomputed from the current time, not added up second by second, there is no accumulated lag: if the tab stays in the background, where browsers slow timers down, the count corrects itself as soon as you return. Accuracy depends on your device clock being right. The ready-made events compute the next occurrence: Christmas is December 25, Brazilian Mother's Day is the 2nd Sunday of May, Father's Day is the 2nd Sunday of August, Valentine's Day in Brazil is June 12, and Black Friday is the Friday after the 4th Thursday of November (US Thanksgiving). Easter comes from an astronomical-ecclesiastical algorithm, and Carnival, a Tuesday, falls 47 days before it: in 2026, Easter is April 5 and Carnival is February 17. You can pick the event's time zone. A concert in Lisbon at 9 pm follows Lisbon's clock, and the country's daylight saving is handled automatically (Brazil has not used it since 2019). The countdown also shows the result in weeks, in calendar months and days and, if you want, in business days from Monday to Friday, without subtracting holidays. Big-screen mode fills the whole screen with huge numbers, handy for projectors, events and classrooms.

Pick a ready-made event or create your own.

1. Tap a ready-made event (Christmas, New Year, Carnival...) or pick a date and time, and name the event if you like.
2. If the event is in another time zone, select it. Turn on Repeat every year for annual events and enter a start date to see the progress bar.
3. Copy the link to share, open big-screen mode or save the countdown to come back to it later in this same browser.

Use this tool on your site

<iframe
  src="https://jkit.tools/embed/en-US/countdown-to-date"
  width="100%"
  height="600"
  style="border:0"
  loading="lazy"
  title="Countdown to a Date"
></iframe>

Sources and references for this tool

These references help contextualize formulas, standards, APIs and limitations used on this page. They do not replace professional validation when a result has legal, financial, medical or operational impact.

• Time Zone DatabaseIANA, The source of the time zone names (America/Sao_Paulo, Europe/Lisbon) and the daylight saving rules the browser uses.
• Intl.DateTimeFormatMDN Web Docs, How the browser converts an instant into a time zone wall-clock date and time.
• Fullscreen APIMDN Web Docs, Basis of big-screen mode, with a CSS full-window fallback.
• Page Visibility APIMDN Web Docs, Why the countdown pauses in a hidden tab and recomputes on return.

Frequently asked questions

Where to go next