What does the Parable of the Vineyard Workers mean? Does the Parable of the Vineyard Workers (in Matthew 20) mean that those who die exactly on judgement day will be the first to enter the Kingdom of Heaven?

Does this mean that when people die they effectively sleep unconsciously until day of judgement? So that the order will be those who die on Judgement day first, followed in order backwards to the beginning of creation?
I love this parable. The labourers symbolize humans, so you and me and everyone else. The householder is God. Working in the vineyard represents being faithful to God in your lifetime. And the money symbolizes Heaven/God's Glory. 

The first group of people work for the whole day. So this means that the first group are faithful and obedient to god for their whole life. The second group works three hours less than the first. This means that this group of people were unfaithful to God their first part of their life but were converted and were faithful for most of their life... And the last group hardly worked at all in comparison with all the other groups. So this means that this group of people were unfaithful their whole life, except were converted for the very last part of their life. 

At the end of the day, everyone receives the same pay no matter how long they worked. What this means is that all people who are faithful to God will make it to heaven and receive the same reward from god, regardless of how long they have been faithful in their lifetime. 

Keep in mind that being faithful and your reward from God can vary depending on your specific denomination.

(In my personal understanding, I don't think Jesus was trying to give the message of "Party your whole life and become faithful your later years" as some might take it. I think he was more trying to get the point across that if you have been faithful your whole life, don't be proud and think that you are better than those who become faithful later in their life. Also I think he is trying to say that no matter who you are or at what point in life you are, Jesus will accept you with open arms and not discriminate against you. Also in my personal experience, I am a happier person when I follow gods commandments so I believe those who entered in the vineyard in the morning actually had it the best because their whole life they were able to enjoy the happiness of being Faithful.)