Thesummer solstice is when theSun is at its highest point in the sky during a year. Thesolstice itself is one moment, but many use the word to mean the day when the solstice happens. The summer solstice does not always happen on exactly the same day.[1]
The word solstice comes fromLatin and means that "the Sun stands still".
For thenorthern hemisphere, the summer solstice is around21 June (20, 21 or 22 of June). This means that the sun is at thenorthern tropic. For thesouthern hemisphere, the summer solstice is around21 December. This means that the sun is at thesouthern tropic.