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."
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.
Solar eclipse polar bear threat
Total solar eclipse on March 20th, 2015 in Norway
Diamond ring as sun returns during total solar eclipse 1 August 2008 (Photo credit: Getty)
On 22 July 2009 the longest total solar eclipse of the 21st century was photographed from the Pacific Ocean for over 6.5 minutes. (Photo credit: Getty)
People watching solar eclipse from atop the canopy crane at the Daintree Rainforest Observatory, Cape Tribulation, Australia
On 22 July 2009 the longest total solar eclipse of the 21st century was photographed from the Pacific Ocean, observed for over 6.5 minutes. The image shows diamond ring effect seconds before the totality, with the first rays of the sun appear after totality. (Photo credit: Getty)
NAIROBI, KENYA NOVEMBER 3:(SOUTH AFRICA OUT) A pupil from Nairobi Consolata primary school, Wangui Mwirigi looks at the total solar eclipse at Sibiloi National Park on November 3, 2 013 in Nairobi, Kenya. (Photo by Joseph Kanyi/Nation Media/Gallo Images/Getty Imagesi)
Total solar eclipse (Photo credit: Getty)
Eclipse (Photo credit: Getty)
Annular solar eclipse, composite image. Solar eclipses occur when the Moon passes across the Sun as seen from Earth. This only occurs at New Moon, and is most commonly a partial eclipse. When the Moon is at a distant point in its orbit, an annular solar eclipse occurs and the corona (revealed in a total eclipse) remains hidden due to the brightness of the solar ring. The arrangement of this digital composite (images from 2005 and 2006) displays the annular eclipse as seen on 20 May 2012 from the south-western USA. (Photo credit: Getty)