Sunlight
Sunrise & Sunset
Follow the changing length of daylight as Earth moves through the seasons.
Explore daylight →
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Time, Sky, and Atomic Precision
Explore time, seasons, and the sky with SkyScan.
Discover how atomic time works, follow the changing sky, explore the seasons, and find support for your SkyScan atomic clock.
Look Up
Today’s Sky
A daily look at sunlight, the Moon, the seasons, and the astronomical events shaping the sky above us.
Moon
Current Moon Phase
Learn why the Moon changes shape throughout the month and what to watch for tonight.
Explore the Moon →Season
Where We Are in the Year
Track solstices, equinoxes, seasonal daylight, and the movement of Earth around the Sun.
Explore the seasons →Coming Up
What to Watch Next
Meteor showers, eclipses, bright planets, conjunctions, and other events worth looking up for.
See Sky Notes →Official U.S. Time
How SkyScan Atomic Clocks Work
SkyScan atomic clocks receive the WWVB radio time signal broadcast by the National Institute of Standards and Technology from Fort Collins, Colorado. When reception conditions are favorable, the clock synchronizes itself with the official United States time standard.
Clock Owner Resources
Need Help with Your SkyScan Clock?
Find manuals, setup instructions, Daylight Saving Time help, and troubleshooting resources.
Need help finding your model? Look for the model number on the back or bottom of your clock. Then visit the User Manuals section for setup instructions, reset steps, and model-specific information.