Never miss an important date
What Day Is First Day of Autumn 2027?
First Day of Autumn 2027 falls on a Wednesday — Wednesday, September 22, 2027. That's 494 days away.
Knowing the day of the week makes it easy to plan time off, travel, or weekend activities. Add a free countdown widget on your iPhone to keep First Day of Autumn in view.
494
days
First Day of Autumn
Outside
Free iPhone app with home screen widgets. Used by 300k+ people.
Date details for First Day of Autumn 2027
- Day of week: Wednesday
- Date: Wednesday, September 22, 2027
- Days remaining: 494
- Weeks remaining: 70
First Day of Autumn 2027 falls on a Wednesday — Wednesday, September 22, 2027. That is 494 days away, or about 70 weeks and 16 months. First Day of Autumn is an astronomical season that begins at a solstice or equinox, the precise moment Earth's tilt reaches a turning point. First Day of Autumn falls on a Wednesday 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 Autumn, 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.
Looking for First Day of Autumn 2026?
More ways to track First Day of Autumn
Turn this date into a shared plan, a home screen habit, or a deeper browse session through related countdown pages.
Share First Day of Autumn with friends
Give everyone the same countdown, reminders, and widgets so the date stays visible for the whole group.
Open page →Put First Day of Autumn on your lock screen
Keep the countdown one glance away with a lock screen widget that updates automatically every day.
Open page →Browse Seasonal Countdowns
Open a hub of related countdown pages so you can keep exploring the strongest cluster around this event.
Open page →About First Day of Autumn
Find out when First Day of Autumn 2027 is. Count down the days and set a reminder.
The Science Behind First Day of Autumn
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 Autumn 2027 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.
First Day of Autumn 2027: Frequently Asked Questions
What day is First Day of Autumn 2027?
First Day of Autumn 2027 falls on Wednesday, Wednesday, September 22, 2027. That is 494 days (about 70 weeks) from today.
What day of the week is First Day of Autumn 2027?
First Day of Autumn 2027 is on a Wednesday. Mark your calendar for Wednesday, September 22, 2027.
Is First Day of Autumn 2027 on a weekday or weekend?
First Day of Autumn 2027 falls on a Wednesday, which is a weekday. Knowing this early helps you plan time off, travel, or gatherings around the date.
When is First Day of Autumn 2027?
First Day of Autumn 2027 is on Wednesday, Wednesday, September 22, 2027 — 494 days away. Add a free countdown widget on your iPhone with the Outside app to keep the date in view.
How many days until First Day of Autumn 2027?
There are 494 days until First Day of Autumn 2027 on Wednesday, Wednesday, September 22, 2027 — approximately 70 weeks from now.
What causes First Day of Autumn to begin?
First Day of Autumn 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 the start of First Day of Autumn the same date every year?
Not exactly. Because the solstice and equinox follow Earth's orbit rather than the calendar, the start of First Day of Autumn can shift by a day or two from year to year. 2027 has its own precise changeover date and time.
What is the difference between meteorological and astronomical First Day of Autumn?
Meteorological seasons are fixed three-month blocks used by forecasters, while astronomical seasons are defined by solstices and equinoxes. The date counted here is the astronomical start of First Day of Autumn 2027.
More Event Days
Find out what day other events fall on.
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.