Spring, as marked by the vernal equinox, begins in March in the Northern Hemisphere. In the Southern Hemisphere, or below the equator, spring begins in September. More »

Spring starts when the vernal equinox occurs, which is usually on or around March 21. An equinox is a date when night and day are exactly the same length. Two occur during the year, one signaling the beginning of spring ... More »

www.reference.com Science Time & Calendars Months & Seasons

During spring, the axis of the Earth starts to tilt toward the sun, which causes the hours of daylight to increase in countries located in the Northern Hemisphere. Air, water and ground temperatures also increase, leadin... More »

Spring starts in the month of March. Astronomically, spring begins at the precise point in time when the center of the sun passes directly over the Equator. This moment is called the vernal equinox. More »

Another name for the first day of spring is the vernal equinox. "Vernal" comes from the Latin word for "spring," and "equinox" comes from a Latin word meaning "time of equal days and nights." More »

The month of March was named after the Roman god of war, Mars. Until the Gregorian calendar replaced the Roman calendar in 1752, March was the first month of the year, rather than the third as it became after the adoptio... More »

www.reference.com Science Time & Calendars Months & Seasons

As of 2015, March is the third month of the year, but it wasn't always so. March was the first month of the 10-month year in the Roman calendar because it was close to spring. Even now, the vernal equinox falls between M... More »