Astronomical autumn begins with the fall equinox, the moment when Earth’s tilt relative to the sun places neither hemisphere in favor. Day and night are nearly equal in length,
Each autumn, clocks across most of the United States and Canada move back one hour as Daylight Saving Time ends. The shift marks the seasonal transition toward shorter days and
Astronomical summer begins with the summer solstice, the moment when the Northern Hemisphere is tilted most directly toward the sun. It’s the longest day of the year in terms
Astronomical spring officially begins with the spring or vernal equinox, a milestone that announces the transition from winter to spring in the Northern Hemisphere. The equinox, occurring around March 20
Astronomical winter begins with the winter solstice, the moment when the Northern Hemisphere is tilted farthest away from the sun. It marks the shortest day and longest night of the
Each year in March, clocks across most of the United States (and Canada) move forward one hour as Daylight Saving Time begins. The shift marks a seasonal turning point, trading
