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www.almanac.com/content/first-day-seasons

Astronomical Season vs. Meteorological Season. The astronomical start of a season is based on the position of the Earth in relation to the Sun.More specifically, the start of each season is marked by either a solstice (for winter and summer) or an equinox (for spring and autumn).

www.almanac.com/content/first-day-fall-autumnal-equinox

Q: Is the Autumnal Equinox Really the First Day of Fall? A: Based on the astronomical definition of seasons, yes, the autumnal equinox does mark the first day of fall (in the Northern Hemisphere). However, according to the meteorological definition of seasons, which is based on temperature cycles and the Gregorian calendar, the first day of ...

www.apples4theteacher.com/holidays/fall/first-day-of-fall.html

Home > Holiday and Occasions > Fall - Autumn > When is the first day of Fall - Autumn 2019? When is the first day of fall 2019? In 2019, fall begins on September 23rd (at 7:50 UTC) for countries in the Northern Hemisphere.The date may be different for you based on what time zone you live in.

www.thesun.co.uk/news/4144147/autumn-begin-summer-end...

What date did autumn 2018 start, when did summer officially end and when was the autumnal equinox? Are you looking forward to the cooler days and darker nights? By Jennifer Newton.

www.metoffice.gov.uk/.../seasons/autumn/when-does-autumn-start

When does autumn start? We often talk about it beginning to feel like autumn when the nights start to draw in and temperatures start feeling cooler. There are two separate dates which could be said to mark the start of autumn in calendars. One is defined by the Earth's axis and orbit around the sun and the second is a fixed date which is used ...

wiki.answers.com/Q/When_does_autumn_officially_start_and_end

Autumn officially begins at the moment when the sun goes from being directly over your hemisphere to being directly over the other one. In the southern hemisphere that happens no earlier than March 19 and no later than March 22.

www.dailystar.co.uk/news/latest-news/725881/Autumn-2018...

AUTUMN 2018: When is autumn? What date does summer end and autumn officially start? It is determined based on the 23.5 degree tilt of the Earth during its rotational axis. This way of classifying seasons takes into account equinoxes and solstices. An equinox is when the length of the day and night are equal.

en.wikipedia.org/wiki/Autumn

Autumn, also known as fall in American English and sometimes in Canadian English, is one of the four temperate seasons.Autumn marks the transition from summer to winter, in September (Northern Hemisphere) or March (Southern Hemisphere), when the duration of daylight becomes noticeably shorter and the temperature cools considerably. One of its main features in temperate climates is the shedding ...

metro.co.uk/2017/09/01/when-does-autumn-start-autumn...

Today marks the start of autumn. It’s a time when we bid a sad farewell to summer but also when nature is at its greatest with trees turning a stunning shade of reds and oranges and birds ...

www.answers.com/Q/When_does_the_fall_officially_begin_and...

When does the fall officially begin and end in the US? ... The autumnal equinox (September 23rd. when day/night are again equal) is the start of Autumn. The winter solstice (December 22nd. the ...