In my humble opinion, this is all nonsense. When people start calculating based upon all sorts of unproven suppositions about what this means or what that represents, I put on my hip boots to avoid stepping in the .... uh .... nonsense.
Don't forget that the mark of a true prophet is one who is correct 100% of the time. In my opinion, the mark of one who knows biblical intrepretation is one who correctly interprets 100% of the time. For this one, we need only wait until the end of September. I suspect that, when October comes with no nuke, they'll post another "corrected" calculation. In the meantime, don't forget to send them a donation. :)
No need to be humble on this one...:)
7th Day Adventists have been in this business for years.