The spring equinox will occur at 5:01 a.m. EDT on Thursday. Here's what to know about the start of the spring season.

During an equinox, the center of the sun is on the same plane as the equator ... Unable to view our graphics? Click here to see them. Day and night aren't exactly 12 hours on the day of the equinox ...

An equinox occurs when the Earth's equator aligns with the sun ... Unable to view the above graphic? Click here to see it. Why are days longer during the spring than winter?

There are only two times during the year when the Earth's equator is not tilted toward ... Unable to view the above graphic? Click here to see it. Why are days longer during the spring than ...

The calendar is about to agree with spring training, seasonal allergies, warming temperatures and crazy weather changes in one more way.

Spring Equinox is rapidly approaching. When is the first day of spring? What we know about when spring starts, winter ends, ...