The fall season officially begins on Monday, Sept. 22, 2025, with the autumnal equinox. An equinox occurs when the Earth's axis is tilted neither toward nor away from the sun, resulting in nearly ...

Spring officially begins at 6:45 pm EDT. — -- Spring is here today -- although it doesn't feel like it some parts of the United States. The vernal equinox will officially begin at 6:45 p.m. ET ...

Stars and planets are lining up for the change of seasons during the Northern Hemisphere's autumnal equinox this year.

In the Northern Hemisphere, the equinox symbolizes the onset of shorter days with longer, cooler nights, while in the Southern Hemisphere, spring arrives with longer, warmer days. This year, the ...

Day and night will get equal time for a brief moment Monday as much of the world heads into fall. The autumnal equinox arrives Monday, marking the start of the fall season for the Northern Hemisphere ...

The equinox happens twice a year, around March 20 and September 22, when day and night are nearly equal in length all over the world. The word itself comes from the Latin aequus (equal) and nox (night ...