Every single Rapture Date that has come and gone gives us more time to prepare ourselves and others for the Lord's coming. We often write with the light that we have at the time of writing. And when more light comes we update what we've written before. We should be prepared to be wrong a thousand times, if it prepares just one more soul for the Lord's coming.  

We're not prophets or date setters. We're Date Investigators. We're seeking out a Rapture Date that God has already set and will not change, for it's an Appointed Day. The Lord is glorified greatly when we're investigating hidden truths in His Word, including the Rapture Date.

"God gets glory from concealing things; kings get glory from investigating things." [Proverbs 25:2]  

And peradventure a Date we're investigating turns out to be wrong. We don't give up! We just dust ourselves off, and continue right on with our investigations! This is what we do, having been made kings by our Lord and God, Jesus Christ.

"...Jesus Christ, the faithful witness, the firstborn from the dead, and the ruler over the kings of the earth...Who loved us...and has made us kings..." [Rev. 1:5,6]