The spring equinox always falls on March 20 or 21 (and occasionally on March 19 in a leap year). In 2025, the big day is Thursday, March 20.

The vernal equinox marks the start of spring in the Northern Hemisphere — so does that mean this is the only day out of the year when you’ll be able to balance an egg? Or not see your own shadow?

This year's first day of spring in the Northern Hemisphere occurs precisely at 5:01 a.m. EST on March 20, according to NASA. The date and time of the equinox varies slightly from year to year.

But you might be wondering if the spring equinox has any day-to-day impact on your life or if it's just a fun thing to observe. Here's what to know. Is the first day of spring always on the same ...