Most Likely Date for the Rapture of the Bride: Pentecost/Shavu'ot
Shavu'ot is the Feast of Firstfruits, and that's why it is the most accurate date for the rapture of the Bride (the first rapture). The firstfruits are always taken before the rest of the harvest. All of Christianity is not the Bride. The Bible states very clearly that the 144,000 are the firstfruits to God.
This is even more evident when you look at the verses in Deuteronomy and Leviticus explaining laws about harvesting the fruits:
"Then it shall be, when you enter the land which the LORD your God gives you as an inheritance, and you possess it and live in it, that you shall take some of the first of all the produce of the ground which you bring in from your land that the LORD your God gives you, and you shall put it in a basket and go to the place where the LORD your God chooses to establish His name." - Deuteronomy 26:1-2
"When you enter the land and plant all kinds of trees for food, then you shall count their fruit as forbidden. Three years it shall be forbidden to you; it shall not be eaten. 'But in the fourth year all its fruit shall be holy, an offering of praise to the LORD."- Leviticus 19:23-24
The commandment in Deuteronomy corresponds to the first rapture when the Bride will be taken. She is the 144,000, the Bride of Christ.
The commandment in Leviticus is about the second rapture. After the tribulation, the remaining saints who are left on the earth will be taken up before the Great Tribulation begins, and the wicked are burned up (hence the burning of the weeds as Jesus talked about in His parables).
Even when considering the parable of the wedding feast, this makes sense. The king is already with his bride at the wedding. She doesn't need an invitation. The saints who were left behind will need an invitation, so the king will send his servants(prophets) to the people to get them to come to the feast. (Side note: the 144,000 were chosen because they keep the commandments of Moses and believe in Jesus.) I believe the prophets will come from the Bride, and will tell the Christians that they are supposed to be following the Law.
I have told my brothers and sisters in Christ that the tribulation will come as curse because we have transgressed the Law, but no one wants to hear that. They just want to say "Grace, grace. Christ did away with the Law", even thought I have proven that that's not true. Apparently, it will be that way during the tribulation as well, because in the parable Jesus said that the people made excuses not to come to the wedding and killed the prophets.
As a result, the king was mad, and rejected them. He later told the prophets to go and invite anyone off the streets who was willing to come. The random people who were invited were not Christians, they were nonbelievers who saw the world falling apart and decided to convert.
Obviously the king is God/Jesus, the Bride is already with Him, the family/friends of the king are Christians, the servants are prophets, and the people who end up at the wedding party are new converts.
Those who have ears to hear, let them hear: Repent for the kingdom of God is at hand. It is never too late to be saved. Even the thief on the cross next to Jesus inherited eternal life at the last hour. That should give us hope.
Shavu'ot/Pentecost/Feast of Firstfruits will begin June 4 at evening next week ,and will end June 6 at evening. I'm hoping for an outpouring of the Holy Spirit this year :)