On March 20th, 2015 there will be a total eclipse of the sun. The moon will pass directly in front of our sun, blocking out its light entirely.
March 20th is also the day of the vernal equinox. As EarthSky notes, "After this 2015 equinox eclipse, the next solar eclipse at the March equinox will happen on March 20, 2034. Then there will be two more in this century: 2053 and 2072."
Unfortunately for those of us in the U.S., the total eclipse will only be visible in parts of Norway and the Faroe Islands. A partial eclipse will be seen in western Africa, Europe and northeast Asia.
You have to be extremely careful when watching this -- it's best to use a pinhole projector, which can be just a tiny hole in a piece of cardboard. Then just aim the sunlight onto another piece of paper.