A total lunar eclipse of the full "Blood Moon" will be visible in some parts of the world on April 4, 2015.
It will be most visible in the Western U.S. and Canada, but what's most notable about this one is how brief the viewing will be. Sky and Telescope breaks it down here. Here's a handy guide from NASA that shows when and where. [PDF Link]
Where to watch the eclipse online:
Griffith Observatory in Los Angeles, 5:00 a.m. to 9:30 a.m. Eastern Daylight Time (9:00 to 13:30 UT).
Gianluca Masi's Virtual Telescope, starting at 6:00 a.m. EDT (10:00 UT).
Slooh Community Observatory, starting at 6:00 a.m. EDT (10:00 UT).