It has not changed. The March equinox can be on the 19th, 20th or 21st of March. It is not at the exact same moment every year, so it does vary. It was on the 20th of March in 2016, when the question was asked. In other years it can be different.
The first day of spring, or March equinox, usually falls on March 20, 21, 22, or 23.
In the years 2010 through 2017 it will fall on the 20th of March.
Because the moon is slightly off from the earth on the day it's supposed to be on so it's on the 20th.
Wednesday 21st September, 1955.
Usually March 21st, but sometimes the vernal equinox can fall on March 20th, such as in 2012.
between march and April depending on your latitude.
Tuesday, 20 March 2012 is the first day of spring
The first day of spring in 1960 was March 20.
The first day of spring is the Spring Equinox. The date of the Spring Equinox is the 21st of March of every year.
March 20th is the first day if spring. Other wise known as the Vernal Equinox.
The date of Easter is determined by the first day of spring. Easter is held on the first Sunday after the first full moon after the first day of spring.
March 21
The first day of spring is March 20 or 21, and both the date and the day of the week variy from year to year. Spring will start on Saturday March 20 in 2010.
The first day of spring in 2008: March 20 at 5:48 am Greenwich time (UTC).
September
Wednesday 21st September, 1955.
The date of Easter is always:The first Sunday afterThe first full moon afterThe first day of Spring.The Vernal Equinox is the first day of Spring. Sometime after that, from a day to three and a half weeks later, will be the first full moon of Spring. The next Sunday after that first full moon of Spring is always Easter. It can be anywhere from about the 22nd of March to the 25th of April.
The first day of spring.
I'm pretty sure it's March 20, 2012
The first day of spring coincides with the equinox (days and nights both 12 hours long). In the northern hemisphere the equinox is around the end of March. In the southern hemisphere it starts about the beginning of September. In the US the first day of Spring will be March 20, 2010. In Australia, the first day of Spring will be 1 September 2010.