September Equinox 2017

When is the September Equinox 2017?

The September Equinox 2017 is on Friday, September 22, 2017 (in 3 days).  2017 Calendar

What is the September Equinox?

The September equinox marks the beginning of autumn in the Northern Hemisphere. Photo: September equinox marks the beginning of autumn in the Northern Hemisphere
The September equinox, also called southward equinox, is the moment in time (not a day-long event) when the Sun stands directly above the equator while crossing from the north to the south. For the Northern Hemisphere (where nearly 90% of the world's population live) it is the autumnal equinox (fall equinox) as it is the moment when summer ends and autumn (fall) begins, while for the Southern Hemisphere it is the vernal equinox (spring equinox), the moment when winter ends and spring begins. Up until the September equinox the Sun rises and sets more to the north of the equator, and afterwards it rises and sets more to the south.

The September equinox usually occurs every year on September 22 or 23. Very occasionally it can also fall on September 21 or 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). While the September 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 September equinox 2017 in your area use this seasons calculator.

The September 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 March equinox, the June solstice and the December solstice.

For more information see September equinox on Wikipedia.

When is the September Equinox 2018?

The September Equinox 2018 is on Sunday, September 23, 2018 (in 369 days).  2018 Calendar

Dates for the September Equinox from 2010 to 2025

The next occurrence of the September Equinox is marked in red.

When is ...? Date      Day of the week      Days away     
September Equinox 2010      September 23, 2010      Thursday      2553 days ago
September Equinox 2011      September 23, 2011      Friday      2188 days ago
September Equinox 2012      September 22, 2012      Saturday      1823 days ago
September Equinox 2013      September 22, 2013      Sunday      1458 days ago
September Equinox 2014      September 23, 2014      Tuesday      1092 days ago
September Equinox 2015      September 23, 2015      Wednesday      727 days ago
September Equinox 2016      September 22, 2016      Thursday      362 days ago
September Equinox 2017      September 22, 2017      Friday      in 3 days
September Equinox 2018      September 23, 2018      Sunday      in 369 days
September Equinox 2019      September 23, 2019      Monday      in 734 days
September Equinox 2020      September 22, 2020      Tuesday      in 1099 days
September Equinox 2021      September 22, 2021      Wednesday      in 1464 days
September Equinox 2022      September 23, 2022      Friday      in 1830 days
September Equinox 2023      September 23, 2023      Saturday      in 2195 days
September Equinox 2024      September 22, 2024      Sunday      in 2560 days
September Equinox 2025      September 22, 2025      Monday      in 2925 days
Data provided 'as is' without warranty

September Equinox 2017 Dates of the September Equinox 2017 and surrounding years
as downloadable image file

Dates of other holidays, events and celebrations

Christian (and related)
Advent Sunday
All Saints' Day
All Souls' Day
Ascension Day
Ash Wednesday
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Boxing Day
Bright Saturday
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Christmas Day
Christmas Eve
Corpus Christi
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Easter Sunday
Easter Week
Easter Weekend
Epiphany Eve
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First day of Lent
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Holy Week
Jesus' Birthday
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Mardi Gras
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Orthodox Easter
Palm Sunday
Pancake Day
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Presidents' Day
    (Washington's Birthday)
Memorial Day
Independence Day
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Thanksgiving Day
Christmas Day

Australian holidays

The seasons
Vernal equinox (spring equinox,
March Equinox)
Summer solstice (June solstice)
Autumn / Fall
Autumnal equinox (fall equinox,
September equinox)
Winter solstice (December solstice)

Other days
April Fools Day
Armed Forces Day
Cinco de Mayo
Constitution Day
Daylight Saving Time
Day of the Dead
Día de los Muertos
Earth Day
Father's Day
Flag Day
Indigenous Peoples' Day
International Women's Day
Mother's Day
Native American Day
New Year's Day
New Year's Eve
Star Wars Day
Summer Time
Teacher Appreciation Day
Teacher Appreciation Week
Valentine's Day
World Environment Day
World Teachers' Day

... and more coming!

Calendars for 2017

Looking for calendars for 2017? We have a large variety of calendar templates for Word, Excel & PDF to download and print. See our list of all calendar templates.

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