RE: Awesome sign in the heavens right under mankinds nose and no one is looking
There is a really strong case for the rapture/Resurrection of the Saints and the Feast of Trumpets. I don't think we can teach it as 100% full proof doctrine, but it would be no surprise at all if it did happen during a future feast day for those familiar with the details of the feast. The feast itself is known as the feast that no one knew the day or hour of because it began by spotting the New moon. Its not on a set calendar date, and can begin anytime withing a 2-3 day period.
There are 7 "Feasts of the Lord" in the OT testament (Lev 23), and Christ is fulfilling them one at a time. The first 4 were fulfilled in the Gospels 2000 years ago with His death, burial and Resurrection. We think of feasts as simply a big meal and party, but these were holy convocations and observances for future works of the Lord on the Earth.
16 Let no man therefore judge you in meat, or in drink, or in respect of an holyday, or of the new moon, or of the sabbath days:
17 Which are a shadow of things to come; but the body is of Christ
The 4 spring feasts were fulfilled 2000 years ago, the 3 fall feasts remain. The next feast on the calendar is the Feast of Trumpets, and Christians are waiting for the Trumpet signaling the Resurrection.