Probably a mis-spelling of "solstice".
The term "solstice" refers to the two points in the year when the sun reaches its highest or lowest position in the sky at noon, resulting in the longest and shortest days. This occurs twice a year: the summer solstice, around June 21, when the day is longest, and the winter solstice, around December 21, when the day is shortest. The word comes from the Latin "solstitium," meaning "sun standing still," as the sun appears to pause before changing direction.
The term "solstice" refers to the two points in the year when the sun reaches its highest or lowest point in the sky at noon, resulting in the longest and shortest days. The summer solstice occurs around June 21 in the Northern Hemisphere, while the winter solstice occurs around December 21. These events mark the changing of seasons and have been celebrated in various cultures throughout history. The word itself is derived from the Latin "solstitium," meaning "sun stands still."