Matt 24:36-37: "But of that day and hour no one knows, not even the angels of heaven, but My Father only. "But as the days of Noah were, so also will the coming of the Son of Man be.

This is a idiom - for the exact time. No one knows the day or the hour when he comes          (referring to the rapture/resurrection) Jesus is speaking in the present tense  and is telling us what the time period will be like when it takes place- like the days of Noah.

The same verse Mark writes and adds:

 Mark 13:32 “But of that day and hour no one knows, not even the angels in heaven, nor the Son, but only the Father.”

He adds nor the son.

The command for Man in his coming is:

Matt 25:13: “Watch therefore, for you know neither the day nor the hour in which the Son of Man is coming.”

Jesus makes it clear a number of times Matt 24:42 “Watch therefore, for you do not know what hour your Lord is coming.” So we can be sure that NO man can discover through the word or revelation this day (also Luke 12:38-39), it is unknown to man.

This is a matter of omniscience versus knowledge-Only God knows all things.

Mark 13:32: “But of that day and hour no one knows, not even the angels in heaven, nor the Son, but only the Father.”

Does this prove Jesus was not God as some disbelievers in His deity claim?

Barnes' commentary states: “This text has always presented serious difficulties. It has been asked, If Jesus had a divine nature, how could he say that he did not know the day and hour of a future event? Some have said that the verb rendered “knoweth” means sometimes to “make” known or to reveal, and that the passage means, “that day and hour none makes known, neither the angels, nor the Son, but the Father.” It is true that the word has sometimes that meaning, as in 1 Cor 2:2, but then it is natural to ask where has “the Father” made it known? (from Barnes' Notes)

Lewis Sperry Chafer says nearly the same of Mark 13:32 where it is recorded that Christ declared that He did not know the day nor the  hour of His return, it may be observed that the passage is not unlike 1 Corinthians 2:2 where the Apostle wrote, “For I determined not to know anything among you, save Jesus Christ, and him crucified.”  The thought is not to make known, or not to cause another to know.  The truth mentioned was not then, as to its time, committed either to the Son or to the angels to publish.”

That is a good point, we know Paul taught the Church the whole counsel of God, so his speaking was not just limited to Christ crucified. But it was the main thing he taught the churches. so the question is did Jesus not know at that time or would not make it known to his disciples then.

There are numerous explanations for this difficult and perplexing verse. Some point out that the ancient Greek manuscripts do not contain the words “neither the son.”

Some others explain Jesus saying that the Son did not know, by His speaking according to his humanity, not his divinity. After saying that neither men nor angels know the day He adds Himself. In his humanity it was not revealed to him by the Father, as he is still in subjection to the Father in the role of a servant waiting for His instruction.

In a similar interpretation others say that His ignorance is due to hidden knowledge kept from him that He willingly allowed, (as a man he grew in wisdom and knowledge). The knowledge of the humanity of Jesus is dependant upon the divine- Jesus knew all things that was revealed to him (Jn 2:25; 16:30; 21:17).  In his humanity, he had limited knowledge (Mk 13:32; Lk 2:52), in the same way he had all power, yet he was hungry and would become weak and slept.

Another comparable explanation is that Jesus as the speaker- represents Himself as receiving His instructions from the Father daily, being  instructed each morning what to communicate for that day. In this view, the precise time of His coming was certainly not given in His instructions; as He had not “seen and heard” it, so he cannot “testify” of it. He had no communication from His Father on this subject at that time.  

 The answer is found in Philippians 2:5-8,  where Jesus is made a servant. A servant does not act or say anything on his own initiative but waits in obedience.

Philippians 2:7-8: “but made Himself of no reputation, taking the form of a bondservant, and coming in the likeness of men. And being found in appearance as a man, He humbled Himself and became obedient to the point of death, even the death of the cross.”

The willful subordination of the Son as explained in Philippians 2, that in His state of humility as both man and God he was not commissioned (yet) to have the time revealed  Philippians 2, describes the “ kenosis.” He did not lose His divine attributes, but gave up their independent use.   

The Son of God as one Person possessed of two natures and as a man was able to draw upon the attributes inherent in His divine nature when it was the will of the Father.  And although “all the treasures of wisdom and knowledge are hid in Him,” He only did what was allowed by his Father: “I do nothing of myself; but as my Father hath taught me, I speak these things” (John 5:19). 

Jesus was perfect in everything He did, and he was also perfect in being a servant.

 In Acts 1:6-7 AFTER the resurrection the disciples ask Jesus- “Lord, will You at this time restore the kingdom to Israel?” And He said to them, “It is not for you to know times or seasons which the Father has put in His own authority.”  Jesus has already stated He would come again to retrieve his church.

John14:3 “And if I go and prepare a place for you, I will come again, and receive you unto myself; that where I am, there ye may be also.
The timing of this event when He was on earth is not revealed. Jesus in his mediatorial position as high priest  is not authorized to officially make it known to his church.

And this is why, Jesus says in Matt 24:37: “But as the days of Noah were, so also will the coming of the Son of Man be.”

In Noah's day when the flood was coming, Noah did not know the timing when the flood was coming UNTIL the day that Noah was told to enter the ark.

Mark 13:33-37: “Take heed, watch and pray; for you do not know when the time is. "It is like a man going to a far country, who left his house and gave authority to his servants, and to each his work, and commanded the doorkeeper to watch. "Watch therefore, for you do not know when the master of the house is coming-- in the evening, at midnight, at the crowing of the rooster, or in the morning-- "lest, coming suddenly, he find you sleeping. "And what I say to you, I say to all: Watch!"

And Paul says the very same thing 1Thess. 5:5-6: “You are all sons of light and sons of the day. We are not of the night nor of darkness. Therefore let us not sleep, as others do, but let us watch and be sober.”

Jesus when He was glorified knew all things as He did before He was incarnated and now enjoys this in the eternal body He is in. And that is why he said In Acts “It is not for you to know times or seasons which the Father has put in His own authority.” 

Again, the way it is presented along with the rest of the Scripture, He was a servant and this is  dealing with His position as a servant.