Ahtta boy just couldn't be more wrong...
Let's look at what is written about the harvest:
Christ is spoken of as having the winnowing fork in his hand by John the Baptist:
Mat 3:12 His winnowing fork is in his hand, and he will clear his threshing floor, gathering his wheat into the barn and burning up the chaff with unquenchable fire
He's previously warned his hearers:
Mat 3:7 But when he saw many of the Pharisees and Sadducees come to his baptism, he said unto them, O generation of vipers, who hath warned you to flee from the wrath to come?
There is an "audience" related connection between the harvest and the "wrath to come".
John 4:35 Say not ye, There are yet four months, and then cometh harvest? behold, I say unto you, Lift up your eyes, and look on the fields; for they are white already to harvest.
John's gospel "fleshes" out the timing and who is being harvested - "fields; for they are white already to harvest".
Mat 9:37 Then saith he unto his disciples, The harvest truly is plenteous, but the labourers are few;
Mat 9:38 KJV Pray ye therefore the Lord of the harvest, that he will send forth labourers into his harvest.
I think we are well within reason to say the "labourers" were his apostles and disciples of the 1st century.
A slightly different view point of the tares and wheat:
Mat 22:3 And sent forth his servants to call them that were bidden to the wedding: and they would not come.
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Mat 22:7 But when the king heard thereof, he was wroth: and he sent forth his armies, and destroyed those murderers, and burned up their city.
This is an obvious allusion to 1st century Jerusalem.
The wedding and the harvest are all part and parcel of the same motif and relates to Jerusalem of the 1st century AD.