Astronomically, we say ‘farewell’ to Summer at the Autumnal Equinox.
This occurs when the Sun passes over the equator into the southern hemisphere - at 2021 BST (1921 GMT/UTC) on 22 September.
Autumn will run until the Winter Solstice - on 21 December. Then Winter will last until the Vernal Equinox, when the Sun passes back into the northern hemisphere - on 20 March 2022.
But in meteorological terms, Autumn is considered to be the months of September, October and November, with the other seasons following in 3-month periods.
And British Summer Time (BST) will cease at 0200 BST on 31 October, in compliance with an EU directive since 2002, which states that ‘Summer Time’ will be observed between the last Sundays in March and October, clocks to change at 0100 UTC. Currently, UK is continuing to observe that directive.
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