The Rapture should occur ANY time now, were already years into the birth pangs we are so very close, Jesus is coming, praise the Lord of Lords, King of Kings, Jesus Christ will return shortly.
Christ comes back after all the trials and tribulations. Sadly, the rapture will happen after them as well.
as to the may 21st.. we will not know the time or the place of his return. no one knows. so I also plan on going about my business on the 21st and the 22nd.....
There is no Prophetic event in the Church Age required before the Rapture, but Prophecy does require some events prior to the Second Coming.
The only plausible counterargument is that the Rapture occurs when the very last member of the Church becomes a believer, completing the bride of Christ.