Summer brings the warmest temperatures of the year and the peak of solar radiation.

This is why, in Ireland, February 1 is often considered the first official day of spring, and November 1 the first day of winter.

December 21 or 22. This is the shortest day of the year.

Winter is the coldest and darkest season of the year. In the Northern Hemisphere:

2. Meteorological Seasons (Based on the Calendar and Temperature)

It is important to remember that these seasons are reversed depending on where you live. When the Northern Hemisphere is tilted toward the sun (Summer), the Southern Hemisphere is tilted away (Winter). Therefore, while a New Yorker is starting their summer on June 21, someone in Sydney, Australia, is beginning their winter.

Irregularities and precise timing

The dates of the four seasons depend on whether you are looking at the calendar through the lens of or meteorology . 1. The Astronomical Seasons

definition (based on Earth's position relative to the Sun) or the meteorological

Starts exactly on June 1 ; ends on August 31 . Autumn (Fall)