Summer Vs. Winter Photo

From the astronomical perspective, days continue to lengthen from equinox to solstice and summer days progressively shorten after the solstice, so meteorological summer encompasses the build-up to the longest day and a diminishing thereafter, with summer having many more hours of daylight than spring. Solstices and equinoxes are taken to mark the mid-points, not the beginnings, of the seasons. Midsummer takes place over the shortest night of the year, which is the summer solstice.
The Western definition based on solstice to equinox is more frequently used where a temperature lag of up to half a season is common. In North America, summer is often the period from the summer solstice (usually June 20 or 21 in the Northern Hemisphere) to the autumn equinox. Unofficially, the U.S. summer season is commonly regarded as beginning on Memorial Day weekend in May and ending on Labor Day weekend in September.
In Chinese astronomy, summer starts on or around 5 May, with the jiéqì (solar term) known as lìxià (立夏), i.e. "establishment of summer", and it ends on or around 6 August.
In southern and southeast Asia, where the monsoon occurs, summer is more generally defined as lasting from March to May/early June, their warmest time of the year, ending with the onset of the monsoon rains.