21 june , first day of summer (summer solstice)
The solstices, together with the equinoxes, are connected with the seasons. In some languages they are considered to start or separate the seasons; in others they are considered to be centre points (in English, in the Northern hemisphere, for example, the period around the June solstice is known as midsummer, and Midsummer’s Day is 24 June, about three days after the solstice itself, first day of summer.).
Solstices occur twice a year, when the tilt of the Earth’s axis is most oriented toward or away from the Sun, causing the Sun to reach its northernmost and southernmost extremes.
