Great post BG Ellis,
 
I entirely agree with this idea..."from the going forth of the command to restore and build Jerusalem until Messiah the Prince"...all aspects/variables have to match to make a perfect fit...any other date and various mismatches occur. I reason why this might be difficult to understand is b/c for many of us here in the U.S. disaster on a national scale and tribulation is not overwhelmingly obvious...even though hardship abounds...things are still relatively intact. But being in the U.S. its as though we are in a box so to speak looking in at ourselves and we say, "its not a complete disaster of biblical scale...the tribulation has not started just yet", but we fail to realize that many in the world are in dire straights. I think if we were to take an aggregate of the entire world population many might agree, to the contrary of us, that the tribulation has begun...(my own opinion).
 
I think basing the return of Christ from Daniel 9 is sound/concrete...which leads to Sep. 23, 2015. Any other date and certain variables dont match.
 
The rapture is mysterious in that the year of its occurance is shrowded in mystery...but I think attempting to determine the timing of the tribulation based on the rapture is backwards. Think of it like an equation...4 + 2 = x. x is the rapture and the 4 and 2 (known variables are the tribulation). Its impossible to use "x" (the rapture) to determine the tribulation, but possible to use the 4 and 2 to determine the value of "x". And the known values of 4 and 2 (the tribulation and timing) are found in Daniel 9. So then back to the beginning, in order to determine a rapture date (mystery) we have to first determine the timeframe of the tribulation...and Daniel 9 amongst others points us there...in which the tribulation ends Sep 23, 2015...feast of atonement...all variables fit!!!
 
May Christ return soon...
 
Stefen