- Vernal Equinox - Eric Weisstein's World of Astronomy
 - Learn when the first day of spring will occur. Article offers a scientific description of the vernal equinox, know as the spring equinox in the northern hemisphere, when night and day are nearly the same length. - Spring Equinox Celebrations
- Describes the related Christian, Jewish, and Neopagan spring-time observances linked in some way to the spring or vernal equinox.
- Celebrating Spring Equinox
- Describes Pagan, Christian, and Islamic customs for the first day of spring, the vernal equinox.
- First Day of Spring - Education World
- Offers a number of gardening lesson plans for school children based around the vernal equinox and the coming of Spring.
- Celebrate First Day of Spring - About.com
- Features craft ideas and other activities for kids to celebrate the first day of Spring on March 20th.
- Spring has Sprung
- The first day of spring in the U.S. is considered to be around March 20 or 21, depending on what day the vernal equinox occurs.
- The Science of Spring
- LiveScience article explaining why the first day of spring, the vernal equinox, arrives on varying dates (from March 19-21) from year to year.
- Vernal Equinox: The Rite of Spring
- Short description of the Vernal Equinox, official beginning of springtime, with charts illustrating the Earth's relation to the Sun from the Weather Network.
- What Day Does Spring Start?
- Examines the row that has erupted over the official date for the start of spring in the U.K.
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