New Delhi | Jagran Lifestyle Desk: June 21 marks the longest day of the year or in many parts of the world it is regarded as the starting of summer in northern hemisphere, as the day will witness the Summer Solstice 2020. The day will also witness a Annular Solar Eclipse 2020 making a ring of fire.

The summer solstice is also known as midsummer or the first day of the summer and can occur on June 20, 21, and 22 depending on calendar events such as leap year and when the Solstice begins relative to Coordinated Universal Time.

This year, Solstice is set to mark on 21 June. Solstice is the time when the sun reaches its highest or lowest point at noon, resulting in the shortest and longest days of the year. The word is derived from the Latin words sol-‘Sun’ and sistere –‘to standstill’ that is when the sun’s daily path pauses at a northern or southern limit before reversing direction. This marks the beginning of astronomical summer in the Northern Hemisphere.

According to NASA and astronomical institutions, June 21 marks the beginning of summer in the Northern Hemisphere and the beginning of winter in the Southern Hemisphere in 2020.

The summer solstice occurs when one of the Earth's poles has its maximum tilt toward the Sun. It happens twice yearly, one in the Northern hemisphere and the other in Southern Hemisphere. At the summer solstice, the Sun travels the longest path through the sky, and that day, therefore, has the most daylight.

On the summer solstice, Earth's maximum axial tilt toward the Sun is 23.44°. Likewise, the Sun's declination from the celestial equator is 23.44°. However, it is not the Sun that is moving north or south through the seasons, but a change in the orientation and angles between the Earth and its nearest star.

The midsummer holds a significant time of the year in many cultures marked by festivals, rituals, and celebrations. In early times Europeans and other temperate regions used to consider this day as the middle of summer. But today many countries especially the northern countries consider it the beginning of summer.

Posted By: Talib Khan