The Probert Encyclopaedia of General Information

SUMMER

Summer is the warmest season of the year. It begins astronomically in northern latitudes when the sun enters the zodiacal sign of Cancer, about June 22nd, and terminates at the autumn equinox, about September 21st. In Britain, summer is officially the months of May, June and July with Midsummer Day the middle of the British summer, but astronomically the start of summer. In the USA, summer is officially the months of June, July and August. Short spells of warm weather in the middle of October and the beginning of November used to be known as St Luke's and St Martin's summer from the occurrence of these saints' days on October 18th and November 11th.
Research Summer