How many days until September 20?
There are calculating until September 20. The next September 20 falls on a calculating.
This September 20 countdown refreshes every second, giving you a precise read on how much time is left — whether you’re keeping tabs on the approaching fall equinox, tracking an end-of-quarter work deadline, or marking a personal date on the calendar.
September 20 date facts
The next September 20 falls in the upcoming year. Positioned just two or three days before the autumnal equinox, it sits near the close of the third quarter and represents one of the last points in the year where astronomical summer still technically holds — before fall officially takes over across the Northern Hemisphere.
Why count down to September 20?
September 20 occupies a notable position late in the third quarter of the year. With the autumnal equinox arriving just two or three days later — typically on September 22 or 23 — this date effectively marks the final hours of astronomical summer in the Northern Hemisphere. For anyone attuned to seasonal rhythms, September 20 is the moment when the shift to fall becomes unmistakably close.
Across the United States, late September is a genuinely busy stretch of the calendar. NFL games are several weeks into the regular season, college football conference matchups are ramping up, and Major League Baseball’s pennant races are entering their most nail-biting phase before the postseason begins. On the cultural side, National Hispanic Heritage Month — observed from September 15 through October 15 — is well underway, and many U.S. companies are pushing to close out third-quarter goals and wrap up project milestones before October arrives.
What happens around September 20?
- The autumnal equinox (typically September 22 or 23) is just days away, signaling the official start of fall.
- NFL regular season play is several weeks in, with standings and storylines already taking shape.
- College football conference schedules are intensifying across all major divisions.
- MLB teams are locked in tight pennant races as the regular season winds down toward playoff contention.
- National Hispanic Heritage Month (Sept. 15–Oct. 15) is being celebrated nationwide.
- Many U.S. businesses are in the final days of their fiscal third quarter, with reporting and reviews on the horizon.
- Fall foliage begins to emerge in northern states, drawing leaf-peeping travelers across New England and the Midwest.
September 20 in the year
In the target year, September 20 is day calculating of the year. Once September 20 has passed, there are calculating days remaining in the year.