Countdown Calculator
See the days left until a date or since it, plus milestone dates.
Counting from today (Nov 11, 2026)
Enter the date as MM/DD/YYYY, for example 12/25/2026.
For a past date, the next milestone is added to your calendar.
Milestones
Dates like 100 days or 1 year after the date you picked. The day after it counts as day 1.
| Milestone | Date | Days left |
|---|
Days left this year
51 days86% of 2026 has passed, with 51 days left including today.
Countdown Calculator
The Countdown Calculator shows how many days are left until a date, or how many days have passed since it. For a past date, it also lists milestone dates such as 100 days, 1,000 days, and 1 year.
Days are counted as the difference between two dates, so a date that is today shows Today and tomorrow shows 1 day to go.
How to use
- Type a date as eight digits (12252026), or pick one with the calendar button or the chips below it.
- Read the countdown along with the same span in weeks and months.
- Further down, check milestone dates such as 100 days or 1 year, and the days left this year.
- Copy the result as a sentence, or add the date to your phone’s calendar.
Key terms
Counting milestones
This calculator counts the day after the date you pick as day 1, so the 100-day milestone is 100 days after that date. If you count the date itself as day 1, the milestone comes one day earlier.
Yearly milestones fall on the same month and day. For February 29, they fall on February 28 in years without a leap day.
Holiday dates
New Year’s Day, the Fourth of July (Independence Day), Thanksgiving, and Christmas are U.S. federal holidays set by law. Thanksgiving falls on the fourth Thursday in November, so its date changes every year.
Calendar files (.ics)
Add to calendar creates an all-day event in iCalendar format, the standard defined in RFC 5545. Phone and computer calendars and Google Calendar can open it. The file is made in your browser and is never sent to a server.
FAQ
Does the countdown include today?
It counts the difference between the dates. A date that is today shows Today, and tomorrow shows 1 day to go.
Does “days left this year” include today?
Yes. It counts from today through December 31. Days passed plus days left equals the days in the year, 365 or 366.
Can I enter dates as DD/MM/YYYY?
This page uses MM/DD/YYYY. You can also pick any date with the calendar button.
Is the date I enter saved?
No. Dates are calculated in your browser and are never saved or sent to a server.