It’s a common misconception that winter brings shorter days. In reality, the opposite is true. The shortest day of the year is the first day of winter, after which the days gradually lengthen until the first day of summer in June, six months later.
The first day of winter is known as the winter solstice, an astronomical event that occurs this year in Arizona on Sunday, December 21, 2025, at 8:03 a.m. However, the date of the winter solstice varies from year to year and can fall anywhere between December 20th and December 23rd.












