What are the dates of the 70 Jubilees?

In a jubilee, debts were canceled, captives were freed and land returned to the iowner.
This will happen in the final jubilee referenced in Early Writings, p 35. This must happen in a jubilee year in my opinion, because of GC 399.9

The jubilees came every 49 years so that the 70 week prophecy of 490 years was 10 jubilees and it began in 457 with a jubilee event when Israel got freedom to leave Persia and get their land back. Christ proclaimed “the acceptable year” of jubilee at the end of the 70 weeks (of years) in 34 AD, but it could not be so because Israel rejected Him. Nevertheless, using these dates, would bring you also to 1798 when the pope was taken prisoner and you can see the dates on the chart you sent are way off. But I can explain why they aren't really so far off

See some of the SDA pioneers articles on the Jubilee from 1843-1844 timeframe:

The Jubilees clock began ticking in 1416 BC when the children of Israel entered Canaan. The first Jubilee was 49 years later in 1367 BC. Every 49 years another Jubilee has occurred.

Dates of the 70 Jubilees
Year - BCYear - BCYear - ADYear - ADYear - AD

The Final Jubilee Year is 2015-2016

The final Jubilee will begin on the Day of Atonement in the fall of 2015. There will have been 40 complete Jubilee cycles following Christ’s death. Isn’t that interesting? There are so many 40’s in the Bible and 40 is a significant number to God. The 40 Jubilees after Christ’s death bring us to the end of probationary time. After the middle of 2016 there will be no more opportunities for people to repent and receive eternal life.

Jesus is King for 40 ½ Jubilees

Jesus died in 31 AD in the middle of the 30th Jubilee cycle. There were 40 ½ Jubilee cycles yet to occur to complete the total of 70.

When Jesus was resurrected He was taken to heaven to reign as king with God on His throne. Jesus ascended to heaven in 31AD and sat down at the right hand of the throne of God.

“Looking unto Jesus, the author and finisher of our faith, who for the joy that was set before Him endured the cross, despising the shame, and has sat down at the right hand of the throne of God.” Hebrews 12:2.

When Jesus comes the second time to get His people He will have reigned in heaven as king for 40 ½ Jubilee cycles. He will have reigned from 31 AD – 55 AD (1/2 Jubilee cycle) and from 55AD – 2016 AD (40 Jubilee cycles) for a total of 40 ½ Jubilee cycles.

David reigned over the children of Israel as their king. Notice how long David reigned as king:

“And they anointed David king over Israel. David was thirty years old when he began to reign, and he reigned forty years. In Hebron he reigned over Judah seven years and six months, and in Jerusalem he reigned thirty-three years over all Israel and Judah.” 2 Samuel 5:3-5.

David reigned in Hebron 7 ½ years and in Jerusalem 33 years for a total of 40 ½ years. David was a type of Jesus and David’s throne was given to Jesus after His resurrection.

“And behold, you will conceive in your womb and bring forth a Son, and shall call His name JESUS. He will be great, and will be called the Son of the Highest; and the Lord God will give Him the throne of His father David. And He will reign over the house of Jacob forever, and of His kingdom there will be no end.” Luke 1:31-33.

David reigned as king on earth for 40 ½ years. 
Jesus will reign as king in heaven for 40 ½ Jubilees.

From Canaan to Canaan

The 70 Jubilees clock began when the children of Israel entered Canaan, the land God had promised them. The 70 Jubilees clock will end when God’s people enter heavenly Canaan, the land God has promised them. From earthly Canaan to heavenly Canaan is 70 Jubilees.

Read on to find out Will we have had 6,000 years of sin by 2016?

Source: http://www.markbeast.com/70jubilees/jubileedates.htm