Adar (January - February Winter) 1994 (5754) to Tishri (September -October Fall) 2012 (5773)
John 4:35 Say not ye, There are yet four months, and then cometh harvest? behold, I say unto you, Lift up your eyes, and look on the fields; for they are white already to harvest.
Calculation for Tribulation Period of 18.666 Years
The Last 20 months Adar 2011 17th Year) + 20 month /12 months = 1.666
17 years + 1.666 years =18.666 Years (2 years of no Latter Rain + 50/3 (16.666))
From Adar 1 (2011) to Adar (2012) there are 13 months. In the months time between 2011 Adar 1 to Adar 1 2012 there are 13 months, because of the month Veadar (Adar 2) in 2011.
b.
From Adar 1 5772 (2012) to (Elul 29) 5772 (2012) there are 7 months. Elul is the last month of the Jewish Civil Year.
c
The Time between the Jewish New Year (Feast of Trumpets) 5773 (2012) (Tishri 1) and the Feast of Ingathering (Tishri 15) is a probable time period for the Return of Christ.