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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.


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

Northern Hemisphere Summer Solstice

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 astronomical 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, Solstice


Astronomical Season Calculator

Winter & Summer Solstices

  1. What is the June Solstice?
  2. Facts about June Solstice
  3. What is the December Solstice?
  4. Facts about December Solstice
  5. When is the Summer Solstice?
  6. When is the Winter Solstice?
  7. June Solstice Celebrations
  8. December Solstice Celebrations
  9. What Causes Seasons?

Equinox & Solstice Worldwide

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