Biblical prophecy suggests the end of days is due this month as the Earth is set to witness a rare blood moon - doomsday preachers have claimed. Preachers believe passages from the books of Acts and Revelation suggest the blood moon will accompany an ever-approaching end of days. The 21st century's longest lunar eclipse will last almost two hours on July 27 and the moon will have a spectacular red tinge. While stargazers enjoy the dazzling phenomenon, doomsdayers will be preparing for armageddon. The theory was originally made famous by Christian ministers John Hagee and Mark Biltz who said the ongoing "tetrad" - four consecutive lunar eclipses which began in April 2014 with six full moons in between - is the indicator of the end of earth as described in the Bible in Acts 2:20 and Revelation 6:12. However the tetrad ended in September 2014 and we're all still here. The end-of-days preachers insist some sort of tragic event is set to hit earth and possibly wipe it out. The theory has