The Longest Day | Greenwich Mean Time

The Longest Day

When is the longest (or shortest) day?

When is the next Solstice / Equinox this year?

In the Northern Hemisphere the Summer Solstice occurs around June 21st whilst the Winter Solstice occurs around December 21st each year. In the Southern Hemisphere the respective dates are reversed.

In the Northern Hemisphere the Vernal Equinox (Spring Equinox) occurs around March 21st whilst the Autumnal Equinox (Fall Equinox) occurs around September 21st each year. Again in the Southern Hemisphere the respective dates are reversed.

You can read here about a very special place in the UK, associated with the Summer Solstice and the sun.

Also here about celebrating light in the darkest moment of the year.

Precise dates and times of solstices and equinoxes from 2016 till 2020 are given below:

Longest day

Date & Time of Solstices & Equinoxes in 2016

  • Vernal Equinox (Spring) March 20 2016 04:30 GMT
  • Summer Solstice (Summer) June 20 2016 22:34 GMT
  • Autumnal Equinox (Fall) September 22 2016 14:21 GMT
  • Winter Solstice (Winter) December 21 2016 10:44 GMT

Date & Time of Solstices & Equinoxes in 2017

  • Vernal Equinox (Spring) March 20 2017 10:28 GMT
  • Summer Solstice (Summer) June 21 2017 04:24 GMT
  • Autumnal Equinox (Fall) September 22 2017 20:02 GMT
  • Winter Solstice (Winter) December 21 2017 16:28 GMT

Date & Time of Solstices & Equinoxes in 2018

  • Vernal Equinox (Spring) March 20 2018 16:15 GMT
  • Summer Solstice (Summer) June 21 2018 10:07 GMT
  • Autumnal Equinox (Fall) September 23 2018 01:54 GMT
  • Winter Solstice (Winter) December 21 2018 22:22 GMT

Date & Time of Solstices & Equinoxes in 2019

  • Vernal Equinox (Spring) March 20 2019 21:58 GMT
  • Summer Solstice (Summer) June 21 2019 15:54 GMT
  • Autumnal Equinox (Fall) September 23 2019 07:50 GMT
  • Winter Solstice (Winter) December 22 2019 04:19 GMT

Date & Time of Solstices & Equinoxes in 2020

  • Vernal Equinox (Spring) March 20 2020 03:49 GMT
  • Summer Solstice (Summer) June 20 2020 21:43 GMT
  • Autumnal Equinox (Fall) September 22 2020 13:30 GMT
  • Winter Solstice (Winter) December 21 2020 10:02 GMT