The Tetrads of 2014 and 2015 created quite a stir due to their rarity and also due to their prior occurence on significant historical dates. Were these signs pointing to 2020 ?

Significant  recent Tetrads were 1949 and 1950 ( Israel founding) , 1967 and 1968 ( Jerusalem recovered) and 2014 and 2015 ( Signs in the Heavens). Tetrads are lunar eclipses which fall on the Jewish Holy days for two consecutive years ; four eclipses each year , two in the spring, two each fall. There have been eight Tetrads in the past 2,000 years. Now consider....

Genesis 45:6-9 King James Version (KJV)

6 For these two years hath the famine been in the land: and yet there are five years, in the which there shall neither be earing nor harvest.

7 And God sent me before you to preserve you a posterity in the earth, and to save your lives by a great deliverance.

8 So now it was not you that sent me hither, but God: and he hath made me a father to Pharaoh, and lord of all his house, and a ruler throughout all the land of Egypt.

9 Haste ye, and go up to my father, and say unto him, Thus saith thy son Joseph, God hath made me lord of all Egypt: come down unto me, tarry not:

The above text describes a "two year famine" (v.6) , to be followed by 5 additional years (v.6) and then "haste ye , and go up " (v.9). In type, this could point to 2020 ; two years of signs in the heavens , the tetrads , 2014 and 2015 to be followed by 5 more years famine (what famine , a famine of hearing.  Amos 8:11) which is 2015 plus 5 = 2020. It is also exactly 70 years from the 1950 tetrad.