Summer solstice 2021


When is the Summer solstice 2021?

The Summer solstice 2021 is on Monday, June 21, 2021 (in 244 days).  Calendar for 2021
The Summer solstice 2020 has already passed: it was on Saturday, June 20, 2020 (122 days ago).  Calendar for 2020
Please note: The dates given on this page are based on Coordinated Universal Time (UTC), which for practical purposes is equivalent to Greenwich Mean Time (GMT). While the Summer solstice occurs at the same moment in time all over the world, the date and local time differ from location to location depending on a location's time zone. For more details see the explanations below.

What is the Summer solstice?

Sunrise over Stonehenge on the day of the summer solstice. In the Northern Hemisphere, the summer solstice marks the beginning of summer. Photo: Wikimedia CommonsSunrise over Stonehenge on the day of the summer solstice. In the Northern Hemisphere, the summer solstice marks the beginning of summer.
A summer solstice is the moment in time when the Earth's tilt towards the Sun is at its maximum and the Sun reaches its highest position in the sky.

A summer solstice occurs twice a year, once in June in the Northern Hemisphere (also called northern solstice, June solstice and Midsummer) and once in December in the Southern Hemisphere (also called southern solstice and December solstice).

In the Northern Hemisphere the day of the summer solstice is the longest day of the year (the day with the most daylight and the shortest night) and occurs every year between June 20 and June 22. The dates given on this page are based on Coordinated Universal Time (UTC), which for practical purposes is equivalent to Greenwich Mean Time (GMT - the time zone of the United Kingdom). While the summer solstice occurs at the same moment in time all over the world, the date and local time differ from place to place depending on the year and a location's time zone. For locations that are ahead of UTC (further east) it may fall on the day after, and for locations that are behind UTC (further west) it may fall on the day before. To find out the exact date and time of the summer solstice 2021 in your area use this seasons calculator.

The summer solstice marks the end of spring and the beginning of summer in the hemisphere where it occurs and is one of four days (two equinoxes and two solstices) throughout the year on which a new season starts. The other days are the vernal equinox (also called spring equinox, beginning of spring), the autumn equinox (also called fall equinox, beginning of autumn) and the winter solstice (beginning of winter).


The exact moment of the northern summer solstice through the centuries
Summer solstice leap shifting. Graph: Wikimedia creative commons
Graph demonstrating the movement (caused by leap shifting) of the exact moment of the summer solstice between 1750 and 2250. X axis (bottom, horizontal): calendar years, Y axis (left, vertical): day in June (20th to 23rd).

In a non-leap year, the moment of the summer solstice is about 5 hours 49 minutes after that moment in the previous year (in UTC), and in a leap year it is about 18 hours 11 minutes before that moment in the previous year, as can be seen in this graph. In this way the time of the summer solstice constantly shifts back and forth so it always stays around June 20 to 22. This four year cycle is clearly visible in the graph.

To adjust for the gradual movement backwards on the calendar (as visible for the period 1900 to 2099), in years divisible by 100 (1800, 1900, 2100 and 2200 on the graph), which should be leap years as they are divisible by 4, the leap day is omitted (except when they are divisible by 400, eg. 2000) and the moment of the summer solstice moves forward in time compared to the same moment in the year before.

Further reading:
Summer solstice on Wikipedia
Solstices in general on Wikipedia

Overview: seasons, equinoxes and solstices

Dates shown apply to the Northern Hemisphere and are based on UTC (GMT)
Season Start End
Spring Spring equinox
(vernal equinox, March equinox)
March 19 to 21
Summer solstice
(June solstice)
June 20 to 22
Summer Summer solstice
(June solstice)
June 20 to 22
Autumn equinox
(Fall equinox, September equinox)
September 21 to 24
Autumn
(Fall)
Autumn equinox
(Fall equinox, September equinox)
September 21 to 24
Winter solstice
(December solstice)
December 20 to 23
Winter Winter solstice
(December solstice)
December 20 to 23
Spring equinox
(vernal equinox, March equinox)
March 19 to 21

When is the Summer solstice 2022?

The Summer solstice 2022 is on Tuesday, June 21, 2022 (in 609 days).  Calendar for 2022

Dates for the Summer solstice from 2016 to 2026

The next occurrence of the Summer solstice is marked in red.

When is ...? Date      Day of the week      Days away     
Summer solstice 2016      June 20, 2016      Monday      1583 days ago
Summer solstice 2017      June 21, 2017      Wednesday      1217 days ago
Summer solstice 2018      June 21, 2018      Thursday      852 days ago
Summer solstice 2019      June 21, 2019      Friday      487 days ago
Summer solstice 2020      June 20, 2020      Saturday      122 days ago
Summer solstice 2021      June 21, 2021      Monday      in 244 days
Summer solstice 2022      June 21, 2022      Tuesday      in 609 days
Summer solstice 2023      June 21, 2023      Wednesday      in 974 days
Summer solstice 2024      June 20, 2024      Thursday      in 1339 days
Summer solstice 2025      June 21, 2025      Saturday      in 1705 days
Summer solstice 2026      June 21, 2026      Sunday      in 2070 days
Data provided 'as is' without warranty

Summer solstice 2021 Dates of the Summer solstice 2021 and surrounding years
as downloadable image file




Printable 2021 Calendars


Calendar templates 2021 for Word, Excel & PDF
Calendar templates 2021 for Word, Excel & PDF

2021 calendar as templates for
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Winter solstice (December solstice)

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Summer time
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