The first day of winter also called the winter solstice, takes place this week across the country and the Northern Hemisphere. The event begins at 4:48 p.m. ET on Wednesday, Dec. 21, according to the U.S. Naval Observatory.
There is a scientific explanation for what will happen The solstice occurs when either of Earth’s poles reaches its maximum tilt away from the Sun – in this case, 23.5 degrees, either toward or away from the sun, according to NPR.org.
This happens twice yearly, once in each hemisphere (Northern and Southern). For that hemisphere, the winter solstice is the day with the shortest period of daylight and the longest night of the year.
While we can calculate the exact time that the solstice occurs, direct observation of the solstice by amateurs is impossible because the Sun moves too slowly or appears to stand still.
The origin of solstice comes from the Latin word sol for sun, and sistere, which means “to come to a stop or make stand.”
The historical importance of the winter solstice
The winter solstice has had a great deal of significance to many cultures historically, from the ancient Egyptians and Romans to many other cultures through the centuries.
Even today, besides the traditional winter holidays of Christmas, Hanukkah, Kwansaa, and the New Year, many cultures around the world still celebrate the longest night of the year with unique winter solstice traditions.
Many traditions are tied to the yule celebration dating back to the Norse people who celebrated the sun’s rebirth for 12 days, it was also celebrated by Anglo-Saxon pagans.
According to the Roman author, naturalist and philosopher, Pliny the Elder, in Britain, druid priests would mark the important date by gathering mistletoe and sacrificing bulls
But in addition to the mistletoe and 12 days of Christmas festivities, several Christmas traditions, such as Yule logs and decorating trees, date back to Yule, which were later adopted by Christians.