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How Many Days Until First Day of Fall 2026?
129 days left.
First Day of Fall is on Tuesday, September 22, 2026.
Get the free iPhone app with countdown widgets, reminder alerts, and easy sharing so you can plan ahead for any event.
129
days
First Day of Fall
Outside
Free iPhone app with home screen widgets. Used by 300k+ people.
There are 129 days until First Day of Fall 2026, which falls on Tuesday, September 22, 2026. That is 18 weeks and 3 days away, or roughly 4 months. First Day of Fall is an astronomical season that begins at a solstice or equinox, the precise moment Earth's tilt reaches a turning point. First Day of Fall 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 First Day of Fall, 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.
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The Science Behind First Day of Fall
Seasons are driven by the tilt of Earth's axis — roughly 23.5 degrees — not by how close the planet is to the Sun. As Earth orbits, each hemisphere leans toward or away from the Sun, changing the angle of sunlight and the length of the day. The astronomical start of a season is pinned to a solstice or an equinox, the precise moment that geometry reaches a turning point.
That is why the start of First Day of Fall 2026 lands on a specific date and even a specific time, rather than the first of a month. Equinoxes bring near-equal day and night worldwide; solstices mark the longest or shortest day of the year. Knowing the exact changeover is useful for gardeners, photographers, and anyone tracking daylight hours.
Frequently Asked Questions
How many days until First Day of Fall?
There are 129 days until First Day of Fall 2026, which falls on Tuesday, September 22, 2026. That's 18 weeks, or roughly 5 months, from today.
When is First Day of Fall 2026?
First Day of Fall 2026 is on Tuesday, September 22, 2026 — 129 days from today. Add it to your calendar or set up a free countdown widget on your iPhone home screen with the Outside app.
What causes First Day of Fall to begin?
First Day of Fall begins because of the 23.5-degree tilt of Earth's axis. As the planet orbits the Sun, each hemisphere leans toward or away from it, changing sunlight and day length. The season's astronomical start is pinned to a solstice or equinox.
Is there a free First Day of Fall countdown app?
Yes. Outside is a free iPhone app with a First Day of Fall countdown widget for your home screen. It includes reminder alerts, calendar sync, and shared countdowns. Used by 300k+ people.
How long until First Day of Fall?
First Day of Fall 2026 is 18 weeks and 3 days away — roughly 5 months from now. Set a reminder so the day doesn't slip past you.
