The Messiah spoke the words of Matthew 24:36 in the present tense before he was killed and brought back to life.
A generation later, his father gave him a revelation to give to John so that he could write it down in the Book of Revelation so that we, his servants, in this present age, might read it.
The revelation from Jesus Christ, which God gave him to show his servants what must soon take place. Rev. 1:1
In that revelation, the Messiah gave us the specific timing of things to come, but not in terms of a Gregorian calendar. That is the point of the website. It explores the timing of things to come, specifically in relation to the great sign of The Woman. (Ref. Rev. 12:1-2)
We have an understanding of celestial mechanics and the computational power to be able to determine exactly when the great sign of The Woman will appear, namely September 23, 2017.
I am not speaking as a prophet. I do not claim that office. The Messiah has revealed this information. No prophet is required. The words are written in the Book of Revelation for all of us to read.
I am, however, matching the timing of the great sign of The Woman, and related events, to the Gregorian calendar.