In this portion of John, we see that Yeshua knew the world hated Him and that His brothers were a part of that world that hated Him. At the Feast celebrations, no man spoke openly of Him for fear of the religious leaders. The religious leaders had made open threats about killing Yeshua and they threatened to kick anyone who acknowledged Yeshua out of the synagogue.
Over the course of Yeshua’s lifetime, He would have kept all of the Commanded Feasts in their appointed times. During the course of Yeshua’s Ministry, He gave no indication that the Feasts would cease to be observed after His death, resurrection and ascension.