Man oh man..you are WAY off base...
you should ditch the Pentecostal/Charismatic/Snake-Handlers and look in the New Testament to see what it really says about people who try and predict the Day...especially supposedly religious people.
It's a quantum leap to claim those who believe in the Rapture are = to those predicting "a" particular day. Second you are 180 degrees off anyway. The Bible commands us to live righteously; even more so "as we see the day approaching".
So G_d gives a command, to follow provisionally, upon actively looking for, and being able to see, that day approaching. (Don't argue with me; not my words....)
Or, kindly explain for us the interpetation of that text.