In meteorological terms, 1 June is the beginning of Summer in the northern hemisphere.
Meteorologists
define northern Summer as the months of June, July and August; but
astronomical Summer starts at the Summer Solstice - this year at 0913
UTC on 21 June, when the Sun reaches its most northerly latitude of 23º
26.1’.
The Sun will leave
the northern hemisphere at the Autumnal Equinox - 0103 UTC on 23
September, when it returns to the south.
And
British Summer Time (BST) will cease at 0100 UTC on 30 October, in
compliance with an EU directive of 2002, which states that ‘Summer Time’
will be observed between the last Sundays in March and October, clocks
to change at 0100 UTC (this assumes that UK continues to comply with
that directive).
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