If you live either in the central or western regions of the United States, get up early on Saturday. It'll be worth the extra effort, and you can always take a nap later.
With the exception of the East Coast, a partial lunar eclipse will be visible starting around 3:17 a.m. Pacific Daylight Time, and will reach its peak about 80 minutes later. As Earth's long shadow falls across the Moon, the part in the shadow will turn dark. It will look as though a chunk were missing from the Moon.
StarDate Online has more on eclipse viewing times for all U.S. time zones. Just two or three lunar eclipses take place each year. A total lunar eclipse--which happens when the shadow completely engulfs the Moon--is expected in December.
This story originally appeared on CBSNews.com.