Summer

• Summer season☉

, warmest season of the year, between spring and autumn. In the Northern Hemisphere, it is usually defined as the period between the summer solstice (year’s longest day), June 21 or 22, and the autumn equinox (day and night equal in length), September 22 or 23; and in the Southern Hemisphere, as the period between December 22 or 23 and March 20 or 21. The temperature contrast between summer and the other seasons exists only in middle and high latitudes; temperatures in the equatorial regions generally vary little from month to month. For physical causes of the seasons, see season .

                           🌻🌻🌻🌻

The concept of summer in European languages is associated with growth and maturity, especially that of cultivated plants, and indeed summer is the season of greatest plant growth in regions with sufficient summer rainfall. Festivals and rites have been used in many cultures to celebrate summer in recognition of its imp up ortance in food production.

A period of exceptionally hot weather, often with high humidity, during the summer is called a heat wave. Such an occurrence in the temperate regions of the Northern Hemisphere in the latter part of summer is sometimes called the dog days.

Year, time required for earth  travel once around the sun, about 365 1/4 days. This fractional number makes necessary the periodic international of days in any calendar that is to be kept in step with the seasons. In the Gregorian calendar a common year contains 365 days, and every fourth year (with a few exceptions) is a leap year 366 days.