In meteorological terms, 1 September is the beginning of Autumn in the northern hemisphere.
Meteorologists define northern Autumn as the months of September, October and November; but many consider that Autumn starts at the Autumnal Equinox - this year at 0104 UTC (0204 BST) on 23 September, when the Sun returns to the southern hemisphere.
And British Summer Time (BST) will cease at 0100 UTC on 30 October, still 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.