First of all, it is important to know that God is not working on our Gregorian calendar but He is rather fulfilling His Word according to the calendar that He established, which is a 360 day year (as opposed to our 365 day year).
In order to understand His times and seasons, we need to be aligned with His calendar. That having been said, when we look at the Jubilee in Leviticus 25:8, it states,
"You shall count seven weeks of years, seven times seven years, so that the time of the seven weeks of years shall give you forty-nine years.
49 years multiplied by 360 days equals 17,640 days, a full Jubilee cycle.
While we cannot exactly calculate the Jubilee of the world, we can calculate the Jubilee of Jerusalem because we know that it was miraculously recaptured by Israel on June 7, 1967.
You can see on the prophetic calendar I put together, that September 23, 2015 is marked a pivotal date. That day marks exactly 17,640 days from the date June 1967. Not only does September 23, 2015 mark the Jubilee of Jerusalem but also falls on the holiest day of the Jewish year, Yom Kippur (the Day of Atonement)!
Normally the trumpet is blown on the Feast of Trumpets, but if we continue reading in Leviticus, we can see that on the Jubilee year, the trumpet is ALSO to be sounded on Yom Kippur!
(Lev 25:9) Then you shall sound the loud trumpet on the tenth day of the seventh month. On the Day of Atonement you shall sound the trumpet throughout all your land.
(Lev 25:10) And you shall consecrate the fiftieth year, and proclaim liberty throughout the land to all its inhabitants. It shall be a jubilee for you, when each of you shall return to his property and each of you shall return to his clan.
WOW. God's word is inerrant. His timing is perfect. There is none like our God, the God of Abraham, Issac and Jacob and His Son Yeshua our soon coming Redeemer. If you don't yet have a shofar, better order yours now… better yet, come buy one HERE IN THE LAND! :)