Sep 22/23: Fall and Spring Equinox

Welcome the first day of fall, or spring, depending on your hemisphere! The September equinox marks the beginning of fall/autumn in the Northern Hemisphere, where it is known as the fall or autumnal equinox. In the Southern Hemisphere, it kicks off the spring season and is called the spring equinox.

But, did you know the equinox doesn't last a whole day but just a moment? It is the exact instant when the Sun crosses the celestial equator—the imaginary line in the sky above Earth’s equator. When this happens, the Earth's rotational axis is neither tilted away from nor toward the Sun.

Calculate the Time and Date With the Time and Date iOS App

Want to know how many hours you have before your next work deadline, exam, or special family event? Or what date it is 256 days from today? Our iOS Time and Date app lets you calculate all this and more with just a touch on the screen.