The first day of summer is the longest day in the northern hemisphere. The first day of winter is the shortest.
The summer solstice marks the longest "day" in the year. It usually occurs on June 21st or 22nd of every year.
Otherwise every day is exactly the same length (24 hours).
December 21st
about 24 hours
Antarctica
On the 21st of December is the winter solstice or shortest day of the year if you live in the northern hemisphere but if you live in the southern hemisphere it is the longest day of the year. on the 21st of June it is the longest day of the year in the northern hemisphere but in the southern hemisphere it is the shortest day of the year and also the summer solstice.
For the Northern Hemisphere that would be on or about December 21st
Those living in the northern hemisphere can celebrate the longest day of the year on the summer solstice, around June 21.
The longest day in any year is the summer solstice. In 2011, this will occur on June 21 in the Northern hemisphere and December 22 in the Southern hemisphere.
21 June
The longest day of the year, also known as the summer solstice, occurs around June 21st in the Northern Hemisphere. It is when the North Pole is tilted closest to the sun, resulting in the longest period of daylight for that hemisphere.
It was a Friday. In the northern hemisphere it was the shortest day and in the southern hemisphere it was the longest day.
The middle of summer, which is, in the Northern Hemisphere, June 21. (Most of the world's tundra is in the Northern Hemisphere.)
its longest they are proportionally inverted
In the northern hemisphere, June 21. In the southern hemisphere, December 21,
summer solstice
Antarctica
In the northern hemisphere it will the 21st of June. In the southern hemisphere, it is on the 21st of December 2018.
It is the winter solstice in the northern hemisphere, when the northern hemisphere is tipped furthest from the sun, resulting in the shortest amount of daylight in the year in the northern hemisphere. In the southern hemisphere, it would be the day with the longest amount of daylight.
June in the Northern hemisphere (it contains the longest day)
The winter solstice (shortest day) of the northern hemisphere is simultaneously the longest day (the summer solstice) in the southern hemisphere. The southern hemisphere summer solstice, falls between December 20 and December 23 inclusive.