7th Sabatical cycle since 1966 ends on Tishrei 5776 (49 years)  

The first Sabbatical cycle of this began in 1966 (5727) and was the Jewish year of the six day war.  From 5727 to 5776  is  7 X 7 = 49 years  it  terminates on Tishri 2015.   The final sabbatical cycle of this starts on September 30, 2008 (5769) and ends September 14, 2015 ----- ten days later is Day of Atonement September 23, 2015.

Also seperately from that calculation is this one below

49 X 360 = 17640

June 7, 1967 to September 22, 23, 2015 Day of Atonement = 17640 Days