In 2018, the longest day of the year and the beginning of the year will be December 21st. The warmest season begins with solstice, although astronomy points to it the exact date and time of the season change vary from year to year.
At what time does the year 2018 begin?
This year will be literally in Buenos Aires December 21 at 19:23. Then the summer will officially begin.
Although at the same time a solstice worldwide appears, the time it takes depends on each of the 24 time zones.
What is Solstice?
Solstice is the time of the year when the Sun, in its apparent movement, passes through one of the points an eclectic farther from Ecuador and where the maximum is given the difference between the day and the night.
The term "solstice" comes from Latin, meaning "the sun continues" and refers to the moments when the sun stops progressing.
The sun arrives at rising heights (in visible form) and make the days longer until you reach one of the solstices. Then, its height starts to decrease, and the days until the next solstice is shortened.
How many solstices are produced in a year
The existence of solstices causes the inclination of the earth's axis on the plain of your orbit. On the day of the solstice, the duration of the day and the height of the sun at noon maximum in summer solstice and minimum in winter solstice, compared to any other day of the year.
It's happening around June 21st. It's called summer in the northern hemisphere or winter on the southern hemisphere.
It's happening around December 21st. This is called winter in the northern hemisphere, or summer in the southern hemisphere.