You shall count seven weeks of years, seven times seven years, so that the time of the seven weeks of years shall give you forty-nine years. Then you shall sound the loud trumpet on the tenth day of the seventh month. On the Day of Atonement you shall sound the trumpet throughout all your land. And you shall consecrate the fiftieth year, and proclaim liberty throughout the land to all its inhabitants. It shall be a jubilee for you, when each of you shall return to his property and each of you shall return to his clan. That fiftieth year shall be a jubilee for you; in it you shall neither sow nor reap what grows of itself nor gather the grapes from the undressed vines. For it is a jubilee. It shall be holy to you. You may eat the produce of the field. Leviticus 25:8-12 Read More
Tetrad: Group of four, in this case 4 blood moons or 4 lunar eclipses. When 4 consecutive eclipses are all total (as opposed to partial) eclipses it is known as a tetrad. There were no tetrads from 1600-1900 and there will be 8 tetrads in the 21st century. The total number of tetrads since Yeshua is 8.