First Day Of Spring 2024 Facts. It may not feel like it in the chilly united states, but it's the first day of spring in the northern hemisphere. Most people use the equinox as their guide for the first day of spring, lasting until the summer solstice in june.

In 2024, the vernal equinox occurred on march 19, signaling the start of spring in the northern hemisphere (and fall in the southern hemisphere). Unlike easter, a moveable feast.