The winter solstice of 2019 occurs on Saturday, Dec. 21, at 8:19 p.m. PST. This is the shortest day of the year for the folks in the North Hemisphere as the North Pole leans away from the Sun.
The solstice, along with the changing season, is caused by Earth’s 23.5-degree tilt as it spins and orbits the sun.
To celebrate, the National Oceanic and Atmospheric Administration (NOAA) released a time-lapse video showing how the tilt affects the seasons from equinox to solstice.
The video contains a loop of images collected each day at 12:00 p.m. UTC from one of NOAA’s satellites, according to the organization’s caption.
For Las Vegas, the sunrise was at 6:47 a.m. and the sunset was just before 4:30 p.m. on Saturday. That means the valley saw less than 10 hours of sunlight.
More images, including an interactive globe with real-time weather patterns shown, are available at the NOAA website.