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When is Fall Equinox (Autumnal Equinox) 2026?
Fall Equinox (Autumnal Equinox) 2026 is on Tuesday, September 22, 2026 — that's 128 days (18 weeks) from today.
Below you'll find the exact date, the day of the week, a live countdown, and everything you need to plan ahead — plus a free iPhone widget that keeps Fall Equinox (Autumnal Equinox) on your home screen.
128
days
Fall Equinox (Autumnal Equinox)
Outside
Free iPhone app with home screen widgets. Used by 300k+ people.
Date details for Fall Equinox (Autumnal Equinox) 2026
- Day of week: Tuesday
- Full date: Tuesday, September 22, 2026
- Days remaining: 128
- Weeks remaining: 18
Fall Equinox (Autumnal Equinox) 2026 is on Tuesday, September 22, 2026. That is 128 days away — about 18 weeks and 2 days, or roughly 4 months, from today. Fall Equinox (Autumnal Equinox) is an astronomical event whose exact date and time can be calculated years in advance from precise celestial mechanics. Fall Equinox (Autumnal Equinox) falls on a Tuesday this year, a midweek date — worth noting if you want to plan time off around it.
Counting down turns a vague "soon" into a clear number of days you can plan around — booking travel, sending cards, or simply building anticipation. Many people begin preparing for a date like this two to three months ahead, and a visible countdown helps pace that preparation rather than leaving everything to the final week. If you are counting down to Fall Equinox (Autumnal Equinox), you can add a free Outside countdown widget to your iPhone home screen; it updates every day and can be shared with friends and family.
More ways to track Fall Equinox (Autumnal Equinox)
Turn this date into a shared plan, a home screen habit, or a deeper browse session through related countdown pages.
Share Fall Equinox (Autumnal Equinox) with friends
Give everyone the same countdown, reminders, and widgets so the date stays visible for the whole group.
Open page →Put Fall Equinox (Autumnal Equinox) on your lock screen
Keep the countdown one glance away with a lock screen widget that updates automatically every day.
Open page →Browse Astronomy Countdowns
Open a hub of related countdown pages so you can keep exploring the strongest cluster around this event.
Open page →About Fall Equinox (Autumnal Equinox)
The Fall Equinox 2026 occurs on Tuesday, September 22nd. Day and night are approximately equal, marking the astronomical start of autumn in the Northern Hemisphere.
History & Significance
The autumnal equinox signals the transition from summer to fall. Many harvest festivals around the world are timed to this event, including the Japanese Shubun no Hi and the Chinese Mid-Autumn Festival. The equinox also marks the beginning of longer nights.
When and How to See Fall Equinox (Autumnal Equinox)
Astronomical events follow precise, predictable celestial mechanics — the alignment of the Sun, Earth, and Moon, or Earth's position in its orbit. That predictability is what lets Fall Equinox (Autumnal Equinox) 2026 be calculated to the exact date and time years in advance.
Many of these events reward a little preparation: a clear sky, a dark spot away from city lights, and good timing. Eclipses and meteor showers are visible only from certain regions or at certain hours, so it is worth checking visibility for your location. A countdown ensures you set aside the evening before the moment passes — some of these events will not repeat for years.
Fall Equinox (Autumnal Equinox) 2026: Frequently Asked Questions
When is Fall Equinox (Autumnal Equinox) 2026?
Fall Equinox (Autumnal Equinox) 2026 is on Tuesday, Tuesday, September 22, 2026 — 128 days from today. You can track it with a free countdown widget on your iPhone home screen using the Outside app.
What day of the week is Fall Equinox (Autumnal Equinox) 2026?
Fall Equinox (Autumnal Equinox) 2026 falls on a Tuesday. Knowing the weekday helps you plan time off, travel, or weekend activities around the date.
How long until Fall Equinox (Autumnal Equinox) 2026?
Fall Equinox (Autumnal Equinox) 2026 is 18 weeks away — roughly 5 months from now. That's plenty of time to plan ahead.
Is there a free Fall Equinox (Autumnal Equinox) countdown app?
Yes. Outside is a free iPhone app with a Fall Equinox (Autumnal Equinox) countdown widget for your home screen, plus reminder alerts and calendar sync. Used by 300k+ people.
How can I see Fall Equinox (Autumnal Equinox) 2026?
To see Fall Equinox (Autumnal Equinox) 2026 you generally want a clear sky, a dark location away from city lights, and the right timing. Some events are visible only from certain regions or at specific hours, so check visibility for your location.
Why is Fall Equinox (Autumnal Equinox) predictable so far in advance?
Fall Equinox (Autumnal Equinox) follows precise celestial mechanics — the alignment of the Sun, Earth, and Moon or Earth's orbital position. Those motions are regular enough to calculate the exact date and time years ahead.
When will Fall Equinox (Autumnal Equinox) happen again after 2026?
Many astronomical events repeat only after long intervals — some eclipses and alignments are years apart. That is why counting down to Fall Equinox (Autumnal Equinox) 2026 matters: missing it can mean a long wait for the next chance.
Home Screen Widgets
Beautiful countdown widgets that sit right on your home screen.
Lock Screen Widgets
See your countdown without even unlocking your phone.
Live Activities
Real-time countdown updates on your Dynamic Island.
