First Day of Winter:
Our planet, the Earth, is divided into two hemispheres that are known as Northern and Southern Hemispheres. In the Northern Hemispheres, the first day of Winter, also called Winter Solstice, will start on Monday, December 21, 2020. Astronomically, it is the shortest day of the year, and its time zone will be December 21, 5:02 A.M. EST. But due to time zone differences, this solstice technically occurs on the next day in some regions. Therefore, the first day of Winter in the Northern Hemisphere can also start on December 22.
On the other hand, the Winter Solstice in the Southern Hemisphere started on Saturday, June 20, 2020, and it was the day with the fewest hours of sunlight in the whole year. The Winter Solstice, whether in the Southern Hemisphere or the Northern Hemisphere, is the shortest day of the year with the least amount of sunlight.
On this day, the Sun reaches the most southern point in the sky at local noon. The Northern Hemisphere’s Winter Solstice happens in December when the North pole is tilted furthest away from the Sun. Due to this reason, the Winter Solstice has the fewest hours of sunlight, and it is the darkest day of the year. On the contrary, in the Southern Hemisphere, the condition is completely opposite. Our planet Earth is tilted with respect to the Sun at an average of 23.5 degrees. Due to this tilt, the Northern and Southern Hemispheres receive an unequal amount of sunlight, and therefore, each Hemisphere cools down when our planet tilts away from the Sun. The Winter Solstice, December on the Northern side and June on the Southern side, occurs when the tilt is at the most extreme level. According to the annual temperature cycle, winter in the Northern hemisphere always arrives in December, January, and February while in the Southern hemispheres comes in June, July, and August. Therefore, in both the hemispheres, these 6 months are considered to be the coldest months.
Here is a shortlist that predicts when will be the winter’s first day in the upcoming years.
2021 Tuesday, December 21
2022 Wednesday, December 21
2023 Friday, December 22
2024 Saturday, December 21
2025 Sunday, December 21