I reject all claims that Christ told anyone that he is returning on a specific date. I know this verse is used a lot but stay with me for a second...
“But of that day and hour no one knows, not even the angels of heaven, but My Father only."- Matthew 24:36
This section is talking about the 2nd coming of Christ, not a rapture because the entire chapter is talking about his coming and answering the question about the end of the age. But the idea is, that if you knew his return date, you would know the rapture date and if you know the rapture date, you would know his return date. Adding/subtracting 7 years or even 3 1/2 years regardless of how long you think the tribulation period is, makes the other date easy to know.
Then you have "not even the angels of heaven" know... What makes humans think that WE would know and Gods own messengers don't? That makes absolutely no sense what-so-ever.
Then you have the concept of Jesus coming like a thief in the night, who announces their arrival and warns the home owner? It literally goes against the parable of the thief in Matthew 24. "Excuse me, I'm a thief but everyone, I'm coming on September 23rd, just so you guys know."
So I believe all these claims, is not from God because to me, they contradict scripture. And since we are called to test the spirits (1 John 4:1), this just looks like false prophecies to me. God would never contradict himself by saying one thing in scripture and doing another.