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When and What is the Summer Solstice?

Solstices are opposite on either side of the equator, so the summer solstice in the Northern Hemisphere is the winter solstice in the Southern Hemisphere and vice versa.

Illustration image
Stonehenge, England during the summer solstice.
Some believe that Stonehenge (2500 BCE) in England was built to help establish when the summer solstice occurred.

Northern Hemisphere summer solstice

(North America, Central America, Europe, Asia, northern Africa)

June solstice 2015:
June 21, at 16:38 UTC.

Southern Hemisphere summer solstice

(Australia, New Zealand, South America, Southern Africa)

December solstice 2015:
December 22, at 04:48 UTC

First day of summer?

The first day of spring, summer, fall and winter can either be defined using atronomical events like solstices and equinoxes, or they can be determined based on meteorological factors, average temperatures.

In the USA and some other areas in the northern hemisphere, the summer solstice marks the first day of summer. However, the official date for the first day of summer varies depending on the country's climate.

Topics: Astronomy, Seasons, December, June, Sun, Earth

In this Article


Equinox & Solstice

  1. March Exquinox
  2. When is the Spring Equinox?
  3. Nearly Equal Night & Day
  4. 10 Facts: March Equinox
  5. June Solstice
  6. Summer Solstice
  7. September Equinox
  8. Autumnal Equinox
  9. December solstice
  10. Winter Solstice

Equinox & Solstice in Culture

Astronomical Season Calculator

Sunrise & Sunset times

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Earth's orbit & solstice

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