The first Tetrad (4 Total Lunar Eclipses) of the Gregorian Calendar occurred in 1909 (5909). The ninth Tetrad is the first to span 3 years and will begin in 2043 (6043).
*However, the truly interesting thing is that all of the major events of the state of Israel converge in one year, 2037.
Genesis 6:3 'And the LORD said, My spirit shall not always strive with man, for that he also is flesh: yet his days shall be an hundred and twenty years.'
Psalm 90:10 'The days of our years are threescore years and ten; and if by reason of strength they be fourscore years, yet is their strength labour and sorrow; for it is soon cut off, and we fly away.'
(Generations don't die off in a year, they die off in a decade - 70's or 80's)
Daniel 9:26 'Seventy weeks are determined upon thy people and upon thy holy city, to finish the transgression, and to make an end of sins, and to make reconciliation for iniquity, and to bring in everlasting righteousness, and to seal up the vision and prophecy, and to anoint the most Holy.'
Please note that the monthly calendar for a single year is presented on the far-right side of the image.
It combines all of the calendars into one and depicts when each new year begins.
From Creation - Nisan 1
Modern Hebrew Calendar - Tishri 1
Gregorian Calendar - January 1 which is normally in the month of Tevet