International Day of Peace
UN observance on September 21 promoting world peace.
Live countdown
How many days until September 21?
See the exact days, hours, minutes, and seconds remaining until September 21. The countdown updates every second using your local timezone.
Counting down to September 21
Local time: --:--:--
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Days
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Hours
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Year progress toward September 21--%
Target DateSeptember 21
TimezoneDetecting
Previous September 21-- days ago
Calculating time remaining until September 21…
At a glance
September 21 date facts
Key calendar details for the next occurrence of September 21.
Weekday----
Day of year--Day 60 of 365
Days left in year--after September 21
Leap year?----
Weeks away---- weeks
MonthSeptember3rd month
Previous----
Next occurrence----
About this date
About September 21
September 21 is the 264th day of the year in the Gregorian calendar (265th in a leap year), situated in early autumn in the Northern Hemisphere in the Northern Hemisphere. It falls in the third quarter, associated with seasonal transitions and year-end planning.
September comes from Latin septem meaning seven, originally the seventh month.
For planning today, September 21 is a fixed annual date: it occurs on the same calendar date every year and is always 1 day after September 20 and 1 day before September 22. That makes the countdown predictable for seasonal events and deadlines.
Why it matters
Why track how many days until September 21?
A fixed early-spring anchor used for personal, academic, and business planning.
Observances are listed only when verified.
On this date
What’s special about September 21?
Important observances, events, traditions, and historical milestones associated with September 21.
Transparency
How the countdown works
1. Next occurrence
We create September 21 at 00:00 in your local timezone for this year. If that moment has already passed, we roll to September 21 next year.
2. Local time only
All calculations use your device clock and local timezone, so the countdown hits zero exactly when September 21 starts where you are.
3. Days → seconds
Remaining milliseconds are converted to days, hours, minutes, and seconds. Values never go negative and update every second.
4. Leap years
Leap years are handled automatically by the calendar — the interval from September 21 to next September 21 is 365 or 366 days as appropriate.
5. Already passed?
If today is after September 21, the timer counts toward next year’s September 21 and shows how many days ago the last one occurred.
6. Responsive & scoped
The timer is scoped to this component, accessible, and works on mobile without external libraries.
Explore
Related countdown dates
Nearby dates and same-day links around September 21.
FAQ
September 21 countdown FAQ
The countdown above shows the exact days, hours, minutes, and seconds until the next September 21 in your local timezone.
Divide the remaining days by seven. The Date Facts section also shows weeks remaining.
September 21 falls on a different weekday each year. See Date Facts for this occurrence’s weekday.
We take the next September 21 at 00:00 local time, subtract the current local time, and convert the difference into days, hours, minutes, and seconds.
Yes. It uses your device’s local timezone, so it reaches zero precisely when September 21 begins for you.
It automatically counts down to September 21 of the following year and shows how many days ago the last September 21 occurred.
September 21 is the International Day of Peace.
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