Summer solstice on June 21th
Publiée le 2007-05-24
In the northern hemisphere the summer solstice corresponds to the date when the apparent longitude of the Sun is equal to 90 degrees and it marks the beginning of this season. Our calendar (the Gregorian calendar) is built so as to remain close to a fixed date for the beginning of the seasons. The date of summer solstice in 2007 is on June 21th at 18h 6m UTC.
In the Gregorian calendar created in 1582, the summer solstice can occur on June 19th, 20th, 21th or 22th. It occurred on June 20th in 1896 and will fall again on this date in 2008. It occurred on June 22th in 1975 and will fall again on this date in 2203, 2207, 2211 and 2215 then in 2302. The summer solstice will fall on June 19th in 2488 and it will be the first time since the creation of Gregorian calendar. On the day of the summer solstice, for an observer located on the tropic of Cancer,
the direction of the Sun points toward the zenith at twelve o'clock. Farther to the North this phenomenon never occurs. The day of solstice is the day when for a given location of the Northern hemisphere, the duration of the day is maximum. The summer solstice in the Northern hemisphere corresponds to the winter solstice in the Southern hemisphere.|