The Blood Moon Prophecy is an idea popularized by Christian pastors John Hagee and Mark Biltz that states the upcoming tetrad (a series of four consecutive total lunar eclipses, with six full moons in between, and no intervening partial lunar eclipses) which begins with the April 2014 lunar eclipse is a sign of significant things to come. Biltz believes that the Second Coming will coincide with the final eclipse of the tetrad, while Hagee only believes the eclipses are a sign of coming change in the course of history for Israel.
The Blood Moon Prophecy has quickly gained attention on the Internet after Biltz first proposed it in 2008, and has gained mainstream media attention as the April 15, 2014 lunar eclipse has approached. Despite the attention, few Christians believe the prophecy. It has been criticized by both mainstream Christian sources and secular astronomy blogs. Critics point out that tetrads that correspond with Jewish feasts are not as rare as Hagee and Biltz imply, that the eclipses will not be visible in Israel, and that the Bible also states it is impossible to know when the Second Coming will occur.