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What is the term for when days and nights are equal in length?
The word is "equinoctial" = equal day and night. It occurs twice a year, on the first day of Spring, and the first day of Autumn.
The is the term given to the first day of spring?
The first day of spring is called the vernal equinox or the March equinox.
What date is spring?
The first day of spring is the Spring Equinox. The date of the Spring Equinox is the 21st of March of every year.
Does the first day of spring move?
The first day of spring is always March 20, or the spring equinox. It is also called the vernal equinox.
What is the term for the time when day and night are of equal duration in each hemisphere?
It is a spring equinox
What is the difference in time between day and night during an equinox?
In the Spring and Fall equinox, night and day have the same number of hours. Equi = equal.
What determines the first day of spring?
The Vernal Equinox determines the first day of spring. The Autumn Equinox is what determines the first day of fall.
When day and night are equall?
Autumn equinox and spring equinox I believe...
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 on March 20, 2014.
What is the first day of spring called?
The first day of spring is called vernal equinox!
What is the time interval between vernal equinoxes called?
one year. the vernal equinox is on March 21, or the first day of spring. an equinox is when day and night is equal (12 hours daylight, 12 hours nighttime). there is a Vernal equinox in spring, and an autumnal equinox on the first day of autumn (or fall), September 21.
What is the day called that brings spring in the northern hemisphere?
spring equinox
