The March and September equinoxes mark the beginning of the spring and autumn seasons on Earth, according to one definition. The equinox in March is the start of spring in the Northern Hemisphere …

In the Northern Hemisphere, the March equinox is also known as the spring or vernal equinox; the September equinox can be called the fall or autumnal equinox. In the Southern Hemisphere, the …

Astronomical spring begins on the day of the equinox. The name of the event derives from Latin and means equal night, giving the impression that both day and night are exactly 12 hours long.

Solstices & Equinoxes for New York ... The Seasons Calculator shows the times and dates of Vernal (Spring) & Autumnal (Fall) equinoxes and Summer and Winter solstices all over the world.

The June solstice is the moment the Sun is directly above the Tropic of Cancer in the Northern Hemisphere. This is the northernmost latitude it reaches during the year.

Solstices & Equinoxes for Seattle ... The Seasons Calculator shows the times and dates of Vernal (Spring) & Autumnal (Fall) equinoxes and Summer and Winter solstices all over the world.

In the Chinese solar calendar, the beginning of spring is marked by lichun, one of 24 yearly solar terms. It occurs when the Sun is at 315° celestial longitude and usually falls on or around February 4 in the …

Astronomical winter begins at the winter solstice, which is the shortest day of the year. This means days get longer during winter—very slowly at first, but at ever-larger daily intervals as the March equinox …

Astronomical summer begins at the summer solstice, which is the longest day of the year. This means days get shorter during summer—very slowly at first, but at ever-larger daily intervals as the …

The June solstice (summer solstice) in Philadelphia is at 4:24 am on Sunday, June 21, 2026. In terms of daylight, this day is 5 hours, 41 minutes longer than the December solstice.