vernal equinox 2010 – first day of spring

today is first day of spring 2010 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.

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