The Messiah At The Feast Of Tabernacles
Jesus Christ observed The Christian Feast of Tabernacles that Christ Himself established in the time of Moses (see 'Before Abraham Was, I AM' and 'The God Of The Old Testament'). After Christ's return, everyone on earth will be observing the Feast of Tabernacles.
"14:16 And it shall come to pass, that every one that is left of all the nations which came against Jerusalem shall even go up from year to year to worship the King, the LORD of hosts, and to keep the feast of tabernacles. 14:17 And it shall be, that whoso will not come up of all the families of the earth unto Jerusalem to worship the King, the LORD of hosts, even upon them shall be no rain. 14:18 And if the family of Egypt go not up, and come not, that have no rain; there shall be the plague, wherewith the LORD will smite the heathen that come not up to keep the feast of tabernacles. 14:19 This shall be the punishment of Egypt, and the punishment of all nations that come not up to keep the feast of tabernacles." (Zechariah 14:16-19 KJV)
"About the midst of the feast Jesus went up into the temple and taught"
The Messiah's observance of the Feast of Tabernacles was amidst those who didn't yet realize that He was indeed the Messiah (see the Fact Finder question below). Even His own brothers (see Mary's Other Children) did not yet see (they didn't do so until after He was crucified).
"7:1 After these things Jesus walked in Galilee: for he would not walk in Jewry, because the Jews sought to kill him. 7:2 Now the Jews' feast of tabernacles was at hand. 7:3 His brethren therefore said unto him, Depart hence, and go into Judaea, that thy disciples also may see the works that thou doest. 7:4 For there is no man that doeth any thing in secret, and he himself seeketh to be known openly. If thou do these things, show thyself to the world. 7:5 For neither did his brethren believe in him.
Jesus not only observed the Feast of Tabernacles, He taught at the Feast of Tabernacles (see also Christ's Eighth Day).
"7:14 Now about the midst of the feast Jesus went up into the temple, and taught. 7:15 And the Jews marvelled, saying, How knoweth this man letters, having never learned?
Fact Finder: Why did so many of the people of His own nation reject the Christ that they were all waiting for?