There is a problem with synchronizing the seven year prophetic period at the end of days with the shmita cycle. 6000 years is not a multiple of 7. 5999 is a multiple of 7. We can't get around this mathematical relationship. If the last year of the great tribulation is a shabbat year then it would be (at the latest) year 5999. I still believe that we are living in the very end of the age but how do we account for the last year using the shmita year cycle?