I am also a Watchman, My wife and have spent much time learning about our Heavenly fathers Calendar, I will use our Saviors words for a moment, Matt 5: 17- Do Not Think !!!! That God runs the Universe according to any Pagan Calendar. God placed the sun the moon and the stars in there place, to determine the Times and seasons, months and years, and if we do not understand them it will be to our disadvantage.
Paul writes 1st Thessalonians 5:1 But concerning the Time and Seasons, brethren, you have no need that I should write to you,-2- For you yourselves know perfectly that the Day of the Lord so comes as a thief in the night. That said! these believers knew the Times and Seasons, They knew when Passover was, they knew when Pentecost was, they knew to watch for the new moon which establishes the Day of Trumpets, for the Day of Trumpets begins at the very moment we see the new moon, we will never know the Day or the Hour, Scripture is the Truth. and we will never know the Day or Hour! every year when Passover is established then all we need to do is watch for the next new moon, which establishes the next month, next new moon, new month. the Day in question is the Day of Trumpets, so watch for the Seventh new moon, and there you are! Day of Trumpets Begins! which you did not rely know the exact Day or Hour.
As for people setting an exact date on the Rapture, according to the Scriptures that would be false prophesying, I don't think we need to stone anyone to death, I encourage people to learn Gods Timeline, we just need to be those that sound the Trumpet, be awake people, and Watch, be sober and vigilant.