That's a theory. It's not a very good one, but it's a theory. There is no reason to believe that Christ did not fulfill all the feast days at His first coming. Scripture says He fuliflled "all righteousness" (Matt. 3:15), and "all the law" (Matt. 5:17). Otherwise Christ did not fulfill "all the law", and you are dead in your trespasses and sin.
Please quote in the context given.
Matthew 3:
13 Then Jesus arrived from Galilee at the Jordan coming to John, to be baptized by him.
14 But John tried to prevent Him, saying, "I have need to be baptized by You, and do You come to me?"
15 But Jesus answering said to him, "Permit it at this time; for in this way it is fitting for us to fulfill all righteousness." Then he permitted Him.
Matthew 5:
16 "Let your light shine before men in such a way that they may see your good works, and glorify your Father who is in heaven.
17 "Do not think that I came to abolish the Law or the Prophets; I did not come to abolish, but to fulfill.
18 "For truly I say to you, until heaven and earth pass away, not the smallest letter or stroke shall pass away from the Law, until all is accomplished.
b'shem Y'shua