2009 June 21 05:45 UTC The summer solstice is the same instant all over the world, it's just that in Australia it is colder than at the winter solstice.
A solstice is an astronomical event that happens twice each year, when the tilt of the Earth'saxis is most inclined toward or away from the Sun, causing the Sun's apparent position in the sky to reach its northernmost or southernmost extreme. The name is derived from the Latinsol (sun) and sistere (to stand still), because at the solstices, the Sun stands still indeclination; that is, the apparent movement of the Sun's path north or south comes to a stop before reversing direction. The term solstice can also be used in a wider sense, as the date (day) when this occurs. The solstices, together with the equinoxes, are connected with the seasons. In some cultures they are considered to start or separate the seasons while in others they fall in the middle. (Wikipedia)
Australia's summer solstice occurs on 21 December.
I don’t know
In the Northern hemisphere, the summer solstice (first day of summer) for 2009 is on June 21st.
1962/06/22 Friday Summer Solstice
The northern hemisphere summer solstice is tomorrow, June 21, 2010, at 11:28 AM GMT.
Under the old calender the summer solstice fell on 11 June 1594 on the feast of St Barnabas
equinoxes
June 21, as usual.
From the point of view of the northern Hemisphere and everyone in it, December 21 is the beginning of Winter, and the position of the sun on that date is the Winter Solstice. From the point of view of the southern Hemisphere and everyone in it, December 21 is the beginning of Summer, and the position of the sun on that date is the Summer Solstice.
Different places have different definitions for when summer begins and ends. I go by the rule that summer begins at the moment of the summer solstice and ends at the moment of the autumnal equinox. In the northern hemisphere the date of the summer solstice ranges from June 19 to June 23, and the date of the autumnal equinox ranges from September 21 to September 24. In the southern hemisphere the date of the summer solstice ranges from December 20 to December 23, and the date of the autumnal equinox ranges from March 19 to March 22.
The longest day in Australia (the longest duration of daylight hours) is on the December solstice, either December 21 or 22. For the years 2016 to 2018, and 2020, it is the 21st. In 2019, it is the 22nd. Day and Date Tuesday December 22, 2015 Wednesday December 21, 2016 Thursday December 21, 2017 Friday December 21, 2018 Sunday December 22, 2019 Monday December 21, 2020
it starts at the begining of summer.. earth is tilted toward the sun... i do not know the exact date but it is the start of summer
21 June
The summer solstice. (Sorry, I don't know the exact date.)