Fall equinox 2023


When is the Fall equinox 2023?

The Fall equinox 2023 is on Saturday, September 23, 2023 (in 351 days).  Calendar for 2023
The Fall equinox 2022 has already passed: it was on Friday, September 23, 2022 (14 days ago).  Calendar for 2022
Please note: The dates given on this page are based on Coordinated Universal Time (UTC), which for practical purposes is equivalent to Greenwich Mean Time (GMT). While the Fall equinox occurs at the same moment in time all over the world, the date and local time differ from location to location depending on a location's time zone. For more details see the explanations below.
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What is the Fall equinox?

The fall equinox marks the beginning of fall. Photo: flickr.com/photos/16516058@N03/8128117868The fall equinox marks the beginning of fall
Fall equinox is another name for the equinox also known as autumn equinox and September equinox. An equinox is the moment in time (not a day-long event) when the Sun stands directly above the equator and day and night are of approximately equal length. For the Northern Hemisphere, the fall equinox is the moment when summer ends and fall (autumn) begins, while for the Southern Hemisphere it is the moment when winter ends and spring begins.

In the Northern Hemisphere the fall equinox occurs every year between September 21 and 24. The dates given on this page are based on Coordinated Universal Time (UTC), which for practical purposes is equivalent to Greenwich Mean Time (GMT - the time zone of the United Kingdom). While the fall equinox occurs at the same moment in time all over the world, the date and local time differ from place to place depending on the year and a location's time zone. For locations that are ahead of UTC (further east) it may fall on the day after, and for locations that are behind UTC (further west) it may fall on the day before. To find out the exact date and time of the fall equinox 2023 in your area use this seasons calculator.

The fall equinox is one of four days (two equinoxes and two solstices) throughout the year that mark the beginning of a new season. The other days are the spring equinox (beginning of spring), the summer solstice (beginning of summer) and the winter solstice (beginning of winter).

The word "equinox" is derived from Latin and means "equal night". On the day of an equinox, day and night are of approximately equal length all over the world, as the Earth's rotational axis is neither tilted away from nor towards the Sun. At all other times the length of day and night will be different.


The exact moment of the fall equinox through the centuries
The exact moment of the autumn equinox between 1900 and 2520. Originally by Frank Klemm, de.wikipedia.org/wiki/Datei:Herbstanfang.png, Creative Commons, CC-by-sa 3.0/de
Graph demonstrating the movement (caused by leap shifting) of the exact moment of the fall equinox between 1900 and 2520. X axis (bottom, horizontal): Calendar years, Y axis (left, vertical): day in September (21 to 23).

In a non-leap year, the moment of the fall equinox is about 5 hours 49 minutes after that moment in the previous year (in UTC), and in a leap year it is about 18 hours 11 minutes before that moment in the previous year, as can be seen in this graph. In this way the time of the fall equinox constantly shifts back and forth so it always stays between September 21 and 24. This four year cycle is clearly visible in the graph.

To adjust for the gradual movement backwards on the calendar (as visible for the period 1900 to 2099), in years divisible by 100 (1900, 2100, 2200, 2300 and 2500 on the graph), which should be leap years as they are divisible by 4, the leap day is omitted (except when they are divisible by 400, eg. 2000 and 2400) and the moment of the fall equinox moves forward in time compared to the same moment in the year before.

Further reading:

Overview: seasons, equinoxes and solstices

Dates shown apply to the Northern Hemisphere and are based on UTC (GMT)
Season Start End
Spring Spring equinox
(vernal equinox, March equinox)
March 19 to 21
Summer solstice
(June solstice)
June 20 to 22
Summer Summer solstice
(June solstice)
June 20 to 22
Autumn equinox
(Fall equinox, September equinox)
September 21 to 24
Autumn
(Fall)
Autumn equinox
(Fall equinox, September equinox)
September 21 to 24
Winter solstice
(December solstice)
December 20 to 23
Winter Winter solstice
(December solstice)
December 20 to 23
Spring equinox
(vernal equinox, March equinox)
March 19 to 21

When is the Fall equinox 2024?

The Fall equinox 2024 is on Sunday, September 22, 2024 (in 716 days).  Calendar for 2024

Dates for the Fall equinox from 2018 to 2028

The next occurrence of the Fall equinox is marked in red.

When is ...? Date      Day of the week      Days away     
Fall equinox 2018      September 23, 2018      Sunday      1475 days ago
Fall equinox 2019      September 23, 2019      Monday      1110 days ago
Fall equinox 2020      September 22, 2020      Tuesday      745 days ago
Fall equinox 2021      September 22, 2021      Wednesday      380 days ago
Fall equinox 2022      September 23, 2022      Friday      14 days ago
Fall equinox 2023      September 23, 2023      Saturday      in 351 days
Fall equinox 2024      September 22, 2024      Sunday      in 716 days
Fall equinox 2025      September 22, 2025      Monday      in 1081 days
Fall equinox 2026      September 23, 2026      Wednesday      in 1447 days
Fall equinox 2027      September 23, 2027      Thursday      in 1812 days
Fall equinox 2028      September 22, 2028      Friday      in 2177 days
Data provided 'as is' without warranty

Fall equinox 2023
Dates of the Fall equinox 2023 and surrounding years as downloadable image file

Printable 2023 Calendars


Calendar templates 2023 for Word, Excel and PDF
Download free printable calendar templates 2023 for Word, Excel and PDF

2023 calendar as templates for
Word, Excel and PDF

A selection of calendar templates for 2023 in landscape and portrait orientation and with US federal holidays, suitable for a variety of applications.

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Dates of other holidays, events and celebrations

US federal holidays
New Year's Day
Martin Luther King Day (MLK Day)
Presidents' Day
    (Washington's Birthday)
Memorial Day
Juneteenth
Independence Day (4th of July)
Labor Day
Columbus Day
Veterans Day
Thanksgiving Day
Christmas Day

Canadian holidays
Canadian Thanksgiving
Family Day

Australian holidays
ANZAC Day

The seasons
Spring
Vernal equinox (spring equinox,
March equinox)
Summer
Summer solstice (June solstice)
Autumn / Fall
Autumn equinox (fall equinox,
September equinox)
Winter
Winter solstice (December solstice)
First Day of Spring
First Day of Summer
First Day of Autumn / First Day of Fall
First Day of Winter

Christian (and related)
Advent
Advent Sunday
All Hallows' Eve
All Hallows' Day
All Saints' Day
All Souls' Day
Ascension Day
Ash Wednesday
Black Saturday
Boxing Day
Bright Saturday
Bright Week
Candlemas
Christmas
Christmas Day
Christmas Eve
Christmastide
Corpus Christi
Easter
Easter Day
Easter Eve
Easter Friday
Easter Monday
Easter Tuesday
Easter Saturday
Easter Sunday
Eastertide
Easter Week
Easter Weekend
Epiphany
Epiphany Eve
Fat Tuesday
First day of Lent
Good Friday
Halloween
Holy Friday
Holy Saturday
Holy Thursday
Holy Week
Jesus' Birthday
Lazarus Saturday
Lent
Mardi Gras
Maundy Thursday
Orthodox Easter
Palm Sunday
Pancake Day
Pancake Tuesday
Pascha
Pentecost
Pentecost Sunday
Pentecost Monday
Shrove Monday
Shrove Tuesday
St. Andrew's Day
St. David's Day
St. George's Day
St. Patrick's Day
St. Stephen's Day
Theophany
Three Kings Day
Trinity Sunday
Twelve Days of Christmas
Twelfth Night
Whit Sunday
Whit Monday
Other days
April Fools Day
Armed Forces Day
Black Friday
Buy Nothing Day
Cinco de Mayo
Constitution Day
Cyber Monday
Daylight Saving Time
Day of the Dead
Día de los Muertos
Diwali (Deepavali)
Earth Day
Election Day
Father's Day
Flag Day
Giving Tuesday
Grandparents' Day
Groundhog Day
Halloween
Human Rights Day
Indigenous Peoples' Day
International Women's Day
Mother's Day
Native American Day
New Year's Day
New Year's Eve
Panic Saturday (Super Saturday)
Parents' Day
Star Wars Day
Samhain
Small Business Saturday
Summer time
Super Saturday (Panic Saturday)
Teacher Appreciation Day
Teacher Appreciation Week
Valentine's Day
World Environment Day
World Teachers' Day
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