On what date does Autumn start in the UK?

Question

On what date does Autumn start in the UK?

Answer 1

Too bloody early

Answer 2

21st September. All of our seasons begin on the 21st. Winter stars on the shortest day of the year (21st December) Spring on the 21st March, Summer, 21st June etc :) I think it works this way in a majority of countries.

Answer 3

21st September

Answer 4

When the leaves fall from the trees

Answer 5

Officially on 21st September, which is the Autumnal Equinox