The summer solstice is the longest day of the year, a day falling around late June when there are approximately 17 hours of light.
The name comes from the Latin solstitium meaning “sun stands still”. It happens because the sun stops heading north at the Tropic of Cancer and then returns back southwards.
In the northern hemisphere this means the days begin to get shorter.
But 2016 is a special year, because the solstice coincides with the Strawberry Moon, a once-in-a-lifetime occurence.
What is the Strawberry Moon?
It is a full moon, which occurs in June, named by early Native American tribes. It is a full moon like any other, but marks the beginning of the strawberry season. The two events coincide once every 70 years.
When is the summer solstice?
In the northern hemisphere, it can fall on different dates from year to year, between 20 and 22 June.
In 2016, it’s on Monday 20 June. The sun will rise at 4.45am and sunset will happen at 10.34pm.
The winter solstice (the shortest day of the year) falls between 20 and 22 December in the UK. This year it’s on 21 December.
Here’s a list of the dates and times of solstices and equinoxes this year.
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
Why is the summer solstice significant?
The summer solstice is a special day for many as it means the start of the summer.
It has links to many ancient cultural practices as different cultures have celebrated it being symbolic of renewal, fertility and harvest.
Why is Stonehenge significant for the solstice?
Stonehenge in Wiltshire is the most popular place in the UK to celebrate the longest day because the prehistoric monument aligns to the solstices. The rising sun only reaches the middle of the stones one day of the year when it shines on the central alter.
It is thought the original builders of Stonehenge had taken giant bluestones from the Preseli Hills in Pembrokeshire to build the inner ring of stones at the monument for reasons that are not fully understood.
The English Heritage-run site is expecting around 20,000 visitors this year.