21st June 2021 (The Longest Day of the Year) : Days change, seasons change as well as the duration of day and night. 365 days of the year are not equal. Sometimes the days are short and the nights are long, and sometimes the days are long and the nights are short.
Similarly, there comes a day in a year when day is recorded as longest and night as shortest. You will have such experience on 21st June. Know why the day is the longest and the night is the shortest on June 21 of the year.
Why is June 21 a longest day?
According to astronomers, the Sun moves from the Northern Hemisphere to the Tropic of Cancer crossing the middle of India. This is the reason that on this day the sun’s rays fall on the earth for a long time.
On this day the sunlight falls on the earth for about 15 to 16 hours. This is the reason why June 21 is the longest day of the year. This phenomenon is called the Summer Solstice. Summer Solstice is celebrated from 20 to 23 June.
On June 21, the shadow of man also leaves his side. In fact, when the Sun is just above the Tropic of Cancer, the shadow disappears for a while. This is a wonderful phenomenon of nature.
Solstice happens twice a year
Solstice is an astronomical event. It happens twice a year. The longest day of the year is recorded once in the summer season when the Sun is viewed from the North or South Pole.
On this day i.e. June 21, the rays of the Sun remain present on the earth for a long time. At the same time, this second astronomical event occurs on 22 December. This day (22th December) is the shortest day of the year and the longest night. On this day the sun’s rays stay on the earth for a short time. These are the two days of the year when there is a great difference in the duration of day and night.