What is the first day of Spring 2010?

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2011-03-21 13:46:55




was Saturday, March 20, 2010 - in the Northern Hemisphere

In the US and Canada:

Saturday, March 20, at approximately midnight is the official

first day of spring for 2010 in the Northern Hemisphere (Vernal


On that day, the Southern Hemisphere observes the Autumnal

Equinox, which is the equivalent of the start of Autumn.




First_day_of_spring_in_the_Northern_Hemisphere">First day of

spring in the Northern Hemisphere

In general, the four seasons correspond to the relative position

of the sun to the earth. Meteorological determination of spring is

calculated according to when the sun passes through the equatorial

plane. When going from winter to spring, the sun is moving north;

as soon as the sun crosses the equator, we call it spring. (This

applies to places north of the equator.)

"First_day_of_spring_in_the_Southern_Hemisphere" id=

"First_day_of_spring_in_the_Southern_Hemisphere">First day of

spring in the Southern Hemisphere

The official date of spring south of the equator (corresponding

to the first official day of fall in places north of the equator)

would be around September 20/21, depending on when the sun crosses

the equator.

Countries such as Australia and New Zealand, however, designate

the first day of September as the official first day of


Background information regarding the seasons:

Spring comes in between the 19th to the 23rd of March and at

different times. It changes on a yearly basis because the first

official day of spring is the (Spring) Vernal Equinox. This is when

the sun is directly above the equator. It rises due East and sets

due West and does not do so on the exact same day every year; this

is because the calendar is not exactly 365 precise days every

single year.

In 2009, spring arrived on March 20; the sun was above the

equator, and crossed to the Northern Hemisphere at approximately

11:47 p.m.

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