Autumn 2024


When is Autumn 2024?

Autumn 2024 starts on Sunday, September 22, 2024 (in 154 days) and ends on Saturday, December 21st 2024 (in 244 days).  Calendar for 2024
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 Autumn starts and ends at the same moment in time all over the Northern Hemisphere, 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 Autumn?

Autumn dawn. Photo: flickr.com/photos/jamesjordan/1531979022Autumn dawn
Autumn, usually called fall in North America, is one of the four seasons that make up the year. It is the intervening period between the warmest time of the year, summer, and the coldest time of the year, winter.

Astronomical autumn vs. meteorological autumn

There are various ways to define the start and end dates of autumn. The two most commonly used ones are based on the astronomical calendar and the meteorological calendar. Astronomical and meteorological autumn start and end on different dates.

Astronomical autumn

In the astronomical calendar the start and end dates of autumn are based on the changing position of Earth in relation to the sun and the resulting solar events of equinoxes and solstices. In the Northern Hemisphere summer ends and autumn starts at the moment of the September equinox, which occurs every year between September 21 and 24. Autumn ends and winter starts at the moment of the December solstice, which occurs every year between December 20 and December 23. In the Southern Hemisphere autumn lasts from the March equinox (March 19 to 21) to the June solstice (June 20 to 22).

The start and end dates for autumn given on this page are the dates of astronomical autumn in the Northern Hemisphere and 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 autumn starts and ends at the same moment in time all over the Northern Hemisphere, 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 autumn 2024 in your area use this seasons calculator.

Meteorological autumn

Meteorologists, on the other hand, define seasons based on climatic conditions and the annual temperature cycle. It is important for them to be able to compare the same period of time in different years. The length of the astronomical seasons varies between 89 and 93 days, while the length of the meteorological seasons is less variable and is fixed at 90 days for winter in a non-leap year (91 days in a leap year), 92 days for spring and summer, and 91 days for autumn. While the exact definition of a season's timing and length can differ in different areas based on local conditions, in most of the Northern Hemisphere meteorological autumn is generally defined as the three months of September, October and November, with the season starting on September 1 and ending on November 30.

There is no "official rule" which definition of autumn to use, and different countries adhere to different conventions. Most of North America and Europe use astronomical autumn, while Australia and New Zealand use meteorological autumn (however, as these countries are in the Southern Hemisphere, the seasons are opposed and autumn there lasts from March to May). In other cultures, eg. in the traditional Chinese calendar and in Celtic traditions, the September equinox is considered to be roughly the middle of autumn.

Further reading:

Comparison table: meteorological spring vs. astronomical spring

Dates shown apply to the Northern Hemisphere and are based on UTC (GMT)
Sea­son Start End
Mete­oro­logi­cal Astro­nomi­cal Mete­oro­logi­cal Astro­nomi­cal
Spring March 1 March 19 to 21
Spring equi­nox
(vernal equi­nox, March equi­nox)
May 31 June 20 to 22
Summer sols­tice
(June sols­tice)
Sum­mer June 1 June 20 to 22
Summer solstice
(June solstice)
August 31 Septem­ber 21 to 24
Autumn equi­nox
(Fall equi­nox, Septem­ber equi­nox)
Au­tumn
(Fall)
Sep­tem­ber 1 Septem­ber 21 to 24
Autumn equi­nox
(Fall equi­nox, Septem­ber equi­nox)
Novem­ber 30 Decem­ber 20 to 23
Winter sols­tice
(Decem­ber sols­tice)
Winter Decem­ber 1 Decem­ber 20 to 23
Winter sols­tice
(De­cem­ber sols­tice)
February 28 (29) March 19 to 21
Spring equi­nox
(vernal equi­nox, March equi­nox)

When is Autumn 2025?

Autumn 2025 starts on Monday, September 22, 2025 (in 519 days) and ends on Sunday, December 21st 2025 (in 609 days).  Calendar for 2025

Dates for Autumn in other years

The next occurrence of Autumn is marked in red.

Year Autumn starts on Autumn ends on
Autumn 2019      Monday, September 23, 2019      Sunday, December 22, 2019
Autumn 2020      Tuesday, September 22, 2020      Monday, December 21, 2020
Autumn 2021      Wednesday, September 22, 2021      Tuesday, December 21, 2021
Autumn 2022      Friday, September 23, 2022      Wednesday, December 21, 2022
Autumn 2023      Saturday, September 23, 2023      Friday, December 22, 2023
Autumn 2024      Sunday, September 22, 2024      Saturday, December 21, 2024
Autumn 2025      Monday, September 22, 2025      Sunday, December 21, 2025
Autumn 2026      Wednesday, September 23, 2026      Monday, December 21, 2026
Autumn 2027      Thursday, September 23, 2027      Wednesday, December 22, 2027
Autumn 2028      Friday, September 22, 2028      Thursday, December 21, 2028
Autumn 2029      Saturday, September 22, 2029      Friday, December 21, 2029
Data provided 'as is' without warranty

Autumn 2024
Dates of Autumn 2024 and surrounding years as downloadable image file

Printable 2024 Calendars for Word, Excel and PDF


Calendar templates 2024 for Word, Excel and PDF

Free printable 2024 calendar templates

A selection of downloadable, printable calendar templates for 2024 with US federal holidays, suitable for a variety of applications. Available for Word, Excel and PDF.


Word

Excel

PDF

Dates of other holidays, events and celebrations

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