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When does the first day of spring?

April 26, 2017answer Mathematics spring weather

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When does the first day of spring?

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The first day of spring is considered to be the vernal equinox or the first of two times in the year that the day and night are of equal length. This year the vernal equinox occurred at 5:48 Greenwich time. The times vary each year and can be either the 20th of the 21st of April The second equinox is the autumnal equinox which occurred on September 22 at 15:44 GMT. You can learn more about these solar occurrences by looking up equinox at wikipedia.