1 Sabbatical Year:

1 Week =                                              1 Sabbath Day +     6 Work Days =   7 Days

1 Lunar Month = 4 Weeks =               4 Sabbath Days + 24 Work Days = 28 Days

1 Lunar Year =  13 Lunar Months = 52 Sabbaths +       312 Work Days = 364 Days

1 Solar Year = 365.2425 Days

Error = 1.2425 Day per Year

7 Sabbatical Years:

6 Lunar Years = 6 X 364 = 2184 Days

7th Lunar Year = 364 days + 1 Additional Week =  364 + 7 = 371 Days

7 Lunar Years = 2184 Days + 371 days  = 2,555 Days

7 Solar Years = 7 X 365.2425 = 2,556.6975 Days

Error = 1.6975 Day per 7 Years

Leviticus 25:9 - Then shalt thou cause the trumpet of the jubile to sound on the tenth day of the seventh month, in the day of atonement shall ye make the trumpet sound throughout all your land.

In 7 years, the lunar calendar is short by 8.6975 days

49 Sabbatical Years:

7 times 7 Lunar Years = 49 Lunar Years = 7 X 2,555 Days = 17,885 Days

Jubilee Year:

50th Year = 1 Additional Week + 1 Lunar Year + 1 Additional Week  = 7 + 364 + 7 = 378 Days

50 Lunar Years = 49 Lunar Years + Jubilee Year = 17,885 + 378 = 18,263 days

50 Solar Years =  50 X 365.2425 = 18,262.125 Days

Error = - 0.875 Day per 50 Years   Lunar Year was longer 0.875 Day to Solar Year

Error: by the end of 49 years, the Lunar Years is short by 11.8825 Days

The western world sometimes look at the middle eastern religion as backwards because of its use of lunar calendar.  But in reality, the lunar calendar is more simple than the Gregorian calendar in used today and it becomes in-sync with the solar calendar every 400 years.  It also brings to light the importance of the celebration of the Jubilee Year as we can read in the Bible.

JUBILEE:

777th Sabbath