In astronomical terms, Winter starts at the Winter Solstice.
This year the Sun reaches its furthest point south of 23º26.1’ at 0327 UTC (~GMT) on 22 December. Astronomical Spring will follow at the Vernal Equinox, when the Sun re-crosses the equator to the north - on 20 March 2024.
But, in meteorological terms, Winter in the northern hemisphere covers the months of December, January and February.
And European clocks should re-adopt Summertime at 0100 UTC on 31 March 2024 (Easter Sunday), 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. At the moment UK still complies with this mandate.
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