When is the first day of spring?

already exists.

Would you like to merge this question into it?

already exists as an alternate of this question.

Would you like to make it the primary and merge this question into it?

exists and is an alternate of .

The date for the start of the astronomical spring season each year is called the Vernal Equinox, one of two days on which the overhead path of the Sun moves across the equator. The actual date depends on one's location north or south of the equator, and will shift due to the 1/4 days by which the orbital year exceeds the calendar year.

For the Northern Hemisphere, the Vernal Equinox is the "March Equinox," which for most of the early 21st century (2001-2006 and 2008-2017) will be March 20. This is the Autumnal Equinox south of the equator.
For the Southern Hemisphere, the Vernal Equinox is the "September Equinox," which falls on September 23 (2010-2011) or September 22 (2012-2013).

The first climatological day of spring, as mandated by the World Meteorological Organization, is March 1 every year in the northern hemisphere and September 1 every year in the southern hemisphere.

Canada, the USA, and some European countries customarily observe the astronomical date (ca. March 20-21/ca. September 22-23) while Australia, New Zealand, and some other European countries follow the climatological date (March 1/September 1). Customary dates are often declared "official" by the mass media although no legal basis exists for this designation. Preferences for the astronomical or climatological dates vary in other countries. Lunar dates are used across much of east Asia to determine the beginning of spring.

The ecological beginning of spring (vernal season) has no fixed dates but is marked locally by the beginning of the growing season for most plants when the local mean daily temperature reaches 6 degrees C/42 degrees F. Many ecologists also recognize a pre-spring (prevernal) season that precedes spring. Pre-spring is a transitional time at the end of winter when only the hardiest plants like the crocus begin to bloom.

Tropical regions of the Earth do not have a spring season.
18 people found this useful

When is the first day of spring 2010?

Saturday, March 20 . Saturday, March 20, is the first day of spring in 2010 in the Northern Hemisphere. This is known as the Vernal Equinox. Simultaneously, places in the

When is the first day of spring 2012?

March 19, March 20, September 22 or September 23, depending on where you are. Northern hemisphere spring starts at 2012-03-20 05:14 UTC. Southern hemisphere spring starts

When is the first day of spring 2011?

First Day of Spring is on March 20, 2011 Astronomical spring in the Northern Hemisphere as defined by the International Astronomical Union begins with the Vernal Equinox on
In Seasons

When is the first day of spring 2013?

The first full day of spring in 2013 is Thursday 21 March for all inhabited land in the northern hemisphere except the Line Islands of Kiribati, where it's Friday 22 March f
In Seasons

When is the first day of spring in 2014?

The first day of the spring equinox is Thursday, March 20th. _______________________ The vernal equinox in the northern hemisphere occurs at 9:57 AM Eastern Daylight Time o