Summer solstice 2020: everything you need to know about the longest day of the year June 1, 2020 By Telegraph reporters Source: Summer solstice 2020: everything you need to know about the longest day of the year Category: structure:news, topics:places/wiltshire, topics:places/stonehenge, topics:places/cornwall, topics:things/sun, topics:events/summer-solstice, storytype:standard Updated: June 1, 2020 at 11:06 am ◀ Mayfair jewellers robbed of £4.2m diamonds in Oceans 13-style heist George Floyd: protests take place in cities around the world ▶