What year did the Hebrew nation with Joshua cross the Jordan river into the promised land?

The Question is the true date of the arrival of Joshua into the Holy Land. I hate to say this but there were those who tried to screw up the dating of the scriptures to disprove Christ way back when. One example of this is found in the Septuagint which was the Greek Scriptures and used in the Coptic Bibles. 1 Kings 6:1 in our bibles corresponds to 3 Kings 6:0 in theirs which reads. ""Listen to Kings III Chapter 6:0 And it came to pass in the {four hundred and fortieth year} after the departure of the children of Israel out of Egypt, in the fourth year and second month of the reign of king Solomon over Israel, 17 that the king commanded that they should take great and costly stones for the foundation of the house, and hewn stones. 18 And the men of Solomon, and the men of Chiram hewed the stones, and laid them for a foundation. '''' (http://www.ecmarsh.com/lxx/Kings%20III/index.htm) Please note that 40 years were either lost or gained depending on which scripture you chose to have be the authority. The Question of what was the true date of this comes up. We know that Christ came, died, roses from the dead and about when but ask when did Joshua arrive in the Holy Land and the answer is clouded by the alterations in the attempt to disprove Christ timing. The answer to Joshua's arrival is 40 years after the Exodus started. How can we figure the true year. Right this second it is impossible, but God's covenant with Israel took place 2 years after the Exodus began. It was a conditional covenant which was to last 70 jubilee sabbath years. We know this because the captivity in Babylon was for 70 years. If we do our home work and read scriptures, Lev 25:2-9, 26:35 &43, 2 Chronicles 36:21 Daniel 9;1, 2 and others, you will find that 3500 years after God gave Israel the Holy Land He will take it back. God help anyone there that does not belong is my guess. This says nothing of his date of return but it does say he will take back the property for other projects He has. That time is soon coming and may even be this 9th of AV. , aug 13/14. When it does happen Events will force us to take notice. All anyone so inclined will need to do then is add 38 years to the date and then subtract 3500 and have the year Joshua and the rest of Israel went happily into the promised land.

What year did the Hebrew nation with Joshua cross the Jordan river into the promised land?

According to the Ancient Seder Olam, it was on the 10th of the month of Nisan, in 2488 or 1407 BC that Joshua took Israel across the Jordan River. This took place 40 years after the exodus from Egypt.

The month of Nisan is the first month on the religious calendar.

Joshua 3:13-17 (NKJV)

And it shall come to pass, as soon as the soles of the feet of the priests who bear the ark of the Lord, the Lord of all the earth, shall rest in the waters of the Jordan, that the waters of the Jordan shall be cut off, the waters that come down from upstream, and they shall stand as a heap.”

So it was, when the people set out from their camp to cross over the Jordan, with the priests bearing the ark of the covenant before the people, and as those who bore the ark came to the Jordan, and the feet of the priests who bore the ark dipped in the edge of the water (for the Jordan overflows all its banks during the whole time of harvest), that the waters which came down from upstream stood still, and rose in a heap very far away at Adam, the city that is beside Zaretan. So the waters that went down into the Sea of the Arabah, the Salt Sea, failed, and were cut off; and the people crossed over opposite Jericho.

Then the priests who bore the ark of the covenant of the Lord stood firm on dry ground in the midst of the Jordan; and all Israel crossed over on dry ground until all the people had crossed completely over the Jordan.

Jamieson-Fausset-Brown Bible Commentary

Jos 3:14-17. The Waters of Jordan Are Divided.

14-16. And it came to pass when the people removed from their tents, &c.—To understand the scene described we must imagine the band of priests with the ark on their shoulders, standing on the depressed edge of the river, while the mass of the people were at a mile's distance. Suddenly the whole bed of the river was dried up; a spectacle the more extraordinary in that it took place in the time of harvest, corresponding to our April or May—when "the Jordan overfloweth all its banks." The original words may be more properly rendered "fills all its banks." Its channel, snow-fed from Lebanon, was at its greatest height—brimful; a translation which gives the only true description of the state of Jordan in harvest as observed by modern travellers. The river about Jericho is, in ordinary appearance, about fifty or sixty yards in breadth. But as seen in harvest, it is twice as broad; and in ancient times, when the hills on the right and left were much more drenched with rain and snow than since the forests have disappeared, the river must, from a greater accession of water, have been broader still than at harvest-time in the present day.

The Book of Jubilees clearly states that the crossing occurred in the year 2450 (counting from the Creation). Some use the A.M. designation (Anno Mundi ="in the year of the world"). See http://www.sacred-texts.com/bib/jub/jub87.htm.

49 jubilees + one week + 2 days + 40 years to come

2,401 + 7 + 2 + 40 = 2,450 A.M. (=end of the 50th jubilee)

This is how jubilees are accounted for in the Dead Sea Scrolls: http://www.haderech.info/DSS/Calendar/4Q319.pdf

Additional research after my original post demonstrates that 2450 AM correlates to 1407 BCE: http://bit.ly/JubileeCalculator (Excel)

The dates for these events, as with most biblical chronological estimates, are debated. Scholars cited in this answer date the crossing of the Jordan at 1406 BCE, 1260 BCE, or 1451 BCE, and the first year of Jubilee to be immediately after or some time soon after those respective dates.

Here is a (lightly edited) elucidation on the method of the calculation of the date of 1406 BCE from The Pattern of Prophecy:

We know this [date of 1406 BCE] from a key chronological marker recorded in the book of Kings. The year Solomon began to build the Temple is given both in terms of the exodus from Egypt as well as the year of Solomon’s reign:

1 Kings 6:1 And it came to pass in the 480th year after the children of Israel were come out of the land of Egypt, in the fourth year of Solomon's reign over Israel, in the month Zif, which is the second month, that he began to build the house of the LORD.

It was established in Thiele’s Mysterious Numbers of the Hebrew Kings that the fourth year of Solomon corresponds to 966 BCE. Therefore the date of the Exodus must be 480 years prior to 966 BCE, or 1446 BCE. Since the Crossing of the Jordan took place 40 years later, that dates it to 1406 BCE.

This commenter on the Seder Olam, a traditional Rabbinic text of chronology, disagrees with that date. He also gives a date of 1268 BCE for the first year of Jubilee. Bracketed comment's are this author's, and the text has been reformatted:

When did these counts start? The Biblical text states: When you come into the land which I give you, then shall the land keep a sabbath unto the Lord. This means that the first cycle to be counted was when they will come into the land and this first count was a Sabbatical year. This first Sabbatical took place when the first tribes took possession of their inheritance, East from the Jordan River, when Moses was still alive. He gave that territory to the tribes of Reuven, Gad and half of the tribe of Manasseh (Numbers 32:33). This took place before the death of Aaron (Numbers 33:38-39) in Hebrew year 2494 [1266 BCE].

After the conquest, the land of Canaan was also divided and given as inheritance to the other tribes. The final inheritance was given to Caleb from the tribe of Judah after he made a plea to Joshua: Caleb was then 85 years old. He must have made his plea just after the end of the first Jubilee, so that a count of 50 years will be fully available to him and his tribe. Therefore the First Jubilee was counted when Caleb was 84 years old. This was in Hebrew year 2500. And the first Sabbatical year was counted 8 years earlier (1 year as the Jubilee year + 7 years for a full Sabbatical cycle), therefore this was in Hebrew year 2500-8= 2492. This indeed was at a time when Aaron was still alive and he performed the first celebrated Sabbatical year. But both he and Moses died before they could celebrate the first Jubilee year in 2500 [which corresponds to 1260 BCE].

In a more Scholarly approach in his book Old Testament Chronology: A Return to the Basics (pdf), Dr. Floyd Nolan Jones gives yet a different date for the crossing of the Jordan supported by previous scholars, and also identifies the first year of Jubilee as 1395 BCE (parenthetical notes are Jones'):

The year Moses died and Joshua entered the land was long ago determined by Ussher, Bishop Loyd, Nicholas Toinard, William Wiston, and now independently confirmed by this author [Jones] as 1451 BC. However, the year of Jubilee did not have to do with merely being in the land but with its actual possession and cultivation (Lev. 25).

After seven years of conflict with the Canaanites, the wars ended at the close of 1445 BC (c. April 1451 - 1445 = 7 years inclusive). From the base camp at Gilgal, Joshua then gave the tribes of Judah and Joseph their portions. Early in 1444, the tabernacle was moved to Shiloh. The rest of the land west of the Jordan was then divided among the remaining seven tribes, and the men from the two-and-a-half tribes east of the Jordan returned home.

Until this, Israel had lived off of the crops of the Canaanites, volunteer crops and supplies from the eastern two-and-a-half tribes (Josh. 24:13). Israel's tillage thus began in 1444. Hence, fom this year are reckoned the Sabbatic and Jubilee years (1444- 49 = 1395 BC, the first Jubilee. See p. 289 ff).