However, no one knows the day or hour when these things
will happen, not even the angels in heaven or the Son himself. Only
the Father knows.
The basic understanding, coming from an Trinitarian perspective, is that Jesus was fully God and fully man, both. Yet, all that He did on the Earth, He did as a man, and not "as" God.
That is, because He was the Son of God, He could have turned the stones to bread, being all powerful. Yet, He chose to operate and identify himself strictly as the Son of Man, hence wilfully limiting his power. Thus, the temptation there would appear to be that he was tempted to operate outside of the boundaries of being human, thus invalidating His ministry.
In the verse above, then, we see that the Son (of Man) was lacking in knowledge, by his own admission, that the Father possessed. This is then interpreted that, in His humanity, He did not know, because He operated out of His ability as a man (anointed by the Holy Spirit), but had He accessed His divine right, which was available but not He did not use, He knows all things.
This circumvents the premise that for Jesus to be given information or revelation from the Father would make Him less than God. It undercuts the argument, because it neither denies that He is God, and one with Him, knowing all things, nor does it deny him being and living as 100% human. Remember, Paul wrote that for those with the Spirit, the Spirit searches, even to the deep things of God, yet this still does not include Mark 13:32 -- see 1 Corinthians 2.
The same would then go for the Revelation, where indicated. It isn't that Jesus isn't God--it's that in His humanity, He purposefully did not act as God, either in deed or in knowledge and understanding. In the same way, Jesus Christ is still both fully man and fully God today. He was dead for approximately three days (depending on your counting), and is alive today, firstborn from the dead.
Thus, because He is both still Son of God and Son of Man, He is still capable of being given revelation from the Father, because He is the Son of Man. Yet at the same time, in His divinity, He would know all things.