From a purely astronomical viewpoint, the equinoxes and solstices would be the middle of the respective seasons, but a variable seasonal lag means that the meteorological start of the season, which is based on average temperature patterns, occurs several weeks later than the start of the astronomical season. According to meteorologists, summer extends for the whole months of June, July and August in the northern hemisphere and the whole months of December, January and February in the southern hemisphere. This meteorological definition of summer also aligns with the commonly viewed notion of summer as the season with the longest (and warmest) days of the year, in which daylight predominates. From the astronomical perspective, days continue to lengthen from equinox to solstice and summer days begin to 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.
Today, the meteorological reckoning of the seasons is used in Australia, Denmark and the former USSR; it is also used by many people in the United Kingdom, where summer is thought of as extending from mid-May to mid-August. The definition based on equinoxes and solstices is more frequently used in the United States where many regions have a continental climate with a temperature lag of about six weeks.
Elsewhere, however, the solstices and the equinoxes are taken to mark the mid-points, not the beginnings, of the seasons. In Chinese astronomy, for example, summer starts on or around May 5, with the jiéqì (solar term) known as Lixia (立夏), i.e. "establishment of summer", and it ends on or around August 6.
In Ireland, the summer months according to the national meteorological service, Met Eireann, are June, July and August. However, according to the Irish Calendar summer begins May 1 and ends July 31. School textbooks in Ireland follow the cultural norm of summer commencing on 1 May rather than the meteorological definition of 1 June.
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.
From a popular culture point of view, in some areas of the United States, summer season is often considered to begin at the Memorial Day weekend (the last Monday in May) and end at the Labor Day weekend (the first Monday in September). Likewise, another set of pop-cultural reference points for summer is the time when elementary and secondary schools close down for the "summer vacation". This period usually lasts from around early to mid June until around late August to early September, depending on where the school is located. Some people in the United States consider summer the period from the summer solstice to the fall equinox.
UTC date and time of solstices and equinoxes
THIS YEARS SOLSTICES AND EQUINOx
Equinox March 20th at 11:44 UTC
Soltices June 21st at 05:45 UTC
Equinox September 22nd at 21:18 UTC
Soltice December 21st at 17:47
ALL THIS BEING SAID WHAT DOES THIS MEAN?????
LISTEN UP EVERYONE!!!!!
ATT WILL RELEASE MMS FOR THE IPHONE WHEN THEY ARE GOD DAMN GOOD AND READY. PERIOD. FINITO. THERE IS NOTHING WE CAN DO. WE WILL HAVE TO SUCK IT UP TILL THEN.... LATE SUMMER IS WHAT EVER ATT WANTS IT TO BE. COULD BE JULY COULD BE OCTOBER COULD BE DECEMBER... COULD BE NEVER.... PATIENCE PEOPLE.... ISNT THERE BIGGER THINGS OUT THERE TO WORRY ABOUT?