"Tonight, two astronomical events will combine to create a truly rare occurrence. The winter solstice occurs tonight — or tomorrow morning, depending on where you happen to live — meaning that it’s the longest night of the year. Combine that with a lunar eclipse, which only occurs a few times per year, and you have the recipe for one of the longest, darkest nights that any living human has had the opportunity to witness. This rare combination hasn’t occurred since 2010, and before that it hadn’t happened in nearly 400 years, so it’s pretty special."
The best time to catch a brief look at the eclipse itself would be around 1:17 a.m. Utah time, as the moon will be completely behind the Earth and should have a nice reddish glow.