EVERYDAY SCIENCE

Detailed explanation-1: -Vernal equinox (about March 21): day and night of equal length, marking the start of spring. Summer solstice (June 20 or 21): longest day of the year, marking the start of summer.

Detailed explanation-2: -Traditionally, we celebrate the first day of spring on March 21, but astronomers and calendar manufacturers alike now say that the spring season starts on March 20th, in all time zones in North America. In 2020, spring fell on March 19th, the earliest first day of spring in 124 years!

Detailed explanation-3: -The vernal equinox happens on March 19, 20, or 21 every year in the Northern Hemisphere. In the Southern Hemisphere, this same event marks the beginning of fall. Meteorologists mark the spring from March 1 through May 31st.

Detailed explanation-4: -Meteorological spring By the meteorological calendar, spring will always start on 1 March; ending on 31 May. The seasons are defined as spring (March, April, May), summer (June, July, August), autumn (September, October, November) and winter (December, January, February).

Detailed explanation-5: -Most meteorologists will argue that spring begins a few weeks before, on March 1st. Meteorological spring began March 1, summer begins June 1, fall begins on September 1 and winter begins on December 1.