The year 1987-88 (5748), and 1993-94 (5754) are identified with Pentecost or the 50h year. Pentecost is on Sivan 6 and the first day of Summer is 10 days later. Wheat continues to ripens 10 days until the start of Summer Harvesting: Jesus identifies full ripening of wheat with four months 'til harvest or the beginning of Summer (10 days from Pentecost).

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.