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In the Northern Hemisphere, summer begins on the day of the summer solstice, June 21st.
Of course, because the Southern Hemisphere is pointed away from the Sun at this time, June 21st is the first day of winter there.
The start of summer is scheduled to begin at summer solstice which is also called June solstice. Summer solstice is usually called the longest day of the year, meaning the longest amount of daylight in a day. That is not the official definition, but it is close enough for most of us.
In recent history, summer solstice has started around June 20 to June 22 in the Georgian calendar. (The calendar that most of the world uses today.)
Technically there is a particular moment each year when the tilt of the Earth's axis of rotation is perfectly aligned so it is at its maximum tilt towards the sun and therefore the top portion (summer solstice) or bottom portion (winter solstice) of the earth gets the maximum amount of illumination from the sun.
According to timeanddate.com, "The June solstice occurs at 17:16 (or 5:16pm) Coordinated Universal Time (UTC) on June 21 in 2011." At the other end of the process, winter season in the Northern hemisphere begin with December solstice. The arrival of winter solstice has a similar variation of a couple of days.
According to timeanddate.com, "The December solstice will occur at 05:30 (or 5:30am) Coordinated Universal Time (UTC) on December 22, 2011"
Fortunately governments and calendars are usually in agreement, but it can always happen that some group or country decides that summer season starts at a time different than the astronomical definition.
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What time of day does summer officially begin in the US?
Summer begins at 1:16 pm on June 21st 2011.
What day officially begins the summer season?
The summer season begins on June 21st every year, except in the case of a leap year, where summer begins on the 20th of June.
When is the first day of summer in France?
Summer begins in the month of June in France. It usually runs for about three months in France. This therefore means that summer in France ends in August or early September.
When the South Pole is tilted toward the sun what season does the US and Canada start?
Your answer depends on where you are. At the South Pole when the Earth is tilted toward the Sun, it's summer.
What month and season is baseball played?
Major league baseball is played in the Spring, Summer and Fall in the US. It begins in March in recent years.
What time of day does summer officially begin in the US?
Summer begins at 1:16 pm on June 21st 2011.
What day officially begins the summer season?
The summer season begins on June 21st every year, except in the case of a leap year, where summer begins on the 20th of June.
What day does summer start in the UK?
Officially, summer begins on June 21st in the northern hemisphere
Is summer on the first day of January?
In the southern hemisphere, summer begins on the first day of December and continues through to January and February.
What begins June 21?
June 21 is the summer solstice, also known as the first day of summer in the Northern Hemisphere. It is the day with the longest daylight hours of the year.
What is the first day of summer 2011 US?
The first day of summer is June 21st
What months are north American summer?
Summer begins with the summer solstice, around 21st of June and autumn begins at the next equinox around September 21st, or so.
Do tornadoes occur mostly in spring or summer?
In the US, tornado season begins in the Spring.
When is US summer?
The USA's summer usually begins on June 21st or June 22nd and lasts up to approximately September 22nd.
When is the first day of summer in France?
Summer begins in the month of June in France. It usually runs for about three months in France. This therefore means that summer in France ends in August or early September.
What is a US holiday in summer?
Independence Day
When does spring 2009 end?
The Vernal Equinox, Spring, begins on the 20th of March and goes on for 3 months. It ends on the 21st of June, when summer begins. The 21st of June will be the Summer Soltice longest day of the year.
