We'll see the fourth blood moon in a tetrad on September 28, 2015. A tetrad btw happens when four consecutive lunar eclipses are all total eclipses.
This tetrad is "rare" as it covers important Jewish Feasts: Passover and Sukkot/ Feast of Tabernacles. Moreover, a total solar eclipse occured on March 20, 2015 which to the Jews was the onset of Nissan, the beginning of the biblical year. Add to the list Yom Kippur, Day of Atonement on the 23rd of September, 2015. The Star od David also reappeared after 2,000 years within the tetrad.
To the Jews, just like the past tetrads which bring significant events to their life as people and nation, this rare ttrad expectedly shall be astoundingly important.
Other info:
Jewis Talmud sees blood moon as a sign of sword coming; and a total solar eclipse as omen, wrath coming to the world.
Judaism and Christianity thoughts consider JOEL 2:31 ( KJV ):
"The sun shall be turned into darkness, and the moon into blood before the great day of the Lord."