The most explicit statement that I'm aware of in the scriptures regarding the timing, associates the giving of the authority in the sky above and the earth beneath with his ascension:

[Dan 7:13-14 NLT] (13) As my vision continued that night, I saw someone like a son of man coming with the clouds of heaven. He approached the Ancient One and was led into his presence. (14) He was given authority, honor, and sovereignty over all the nations of the world, so that people of every race and nation and language would obey him. His rule is eternal--it will never end. His kingdom will never be destroyed.

Paul qualifies the extent of his rule by stating the obvious exception:

[1Co 15:27 NLT] (27) For the Scriptures say, "God has put all things under his authority." (Of course, when it says "all things are under his authority," that does not include God himself, who gave Christ his authority.)

(Paul clearly did not believe that Jesus was "eternally co-equal with the Father" nor would he abide "eternally his majesty co-equal with the Father" or any of the other Trinitarian nonsense:

[1Co 8:6 NLT] (6) But we know that there is only one God, the Father, who created everything, and we live for him. And there is only one Lord, Jesus Christ, through whom God made everything and through whom we have been given life.

[Eph 4:6 NLT] (6) and one God and Father, who is over all and in all and living through all.

[1Ti 2:5 NLT] (5) For there is only one God and one Mediator who can reconcile God and humanity--the man Christ Jesus.

John says that his ascension was a benefit to him:

[Jhn 14:28 NLT] (28) Remember what I told you: I am going away, but I will come back to you again. If you really loved me, you would be happy that I am going to the Father, who is greater than I am.

That is because he would be seated at God's right hand (which is a dependent position):

[Jhn 16:7 KJV] (7) Nevertheless I tell you the truth; It is expedient for you that I go away: for if I go not away, the Comforter will not come unto you; but if I depart, I will send him unto you.

"Being seated" doesn't mean that Jesus is stuck in a chair but rather that he has been installed as ruler:

[Jhn 20:22 NLT] (22) Then he breathed on them and said, "Receive the Holy Spirit.

Acts may take this literally:

[Act 2:33 KJV] (33) Therefore being by the right hand of God exalted, and having received of the Father the promise of the Holy Ghost, he hath shed forth this, which ye now see and hear.

John had said that it could not occur until he ascended, suggesting that he had ascended shortly, if not immediately, after his encounter with Mary:

[Jhn 20:17-22 NLT] (17) "Don't cling to me," Jesus said, "for I haven't yet ascended to the Father. But go find my brothers and tell them, 'I am ascending to my Father and your Father, to my God and your God.'" (18) Mary Magdalene found the disciples and told them, "I have seen the Lord!" Then she gave them his message. (19) That Sunday evening the disciples were meeting behind locked doors because they were afraid of the Jewish leaders. Suddenly, Jesus was standing there among them! "Peace be with you," he said. (20) As he spoke, he showed them the wounds in his hands and his side. They were filled with joy when they saw the Lord! (21) Again he said, "Peace be with you. As the Father has sent me, so I am sending you." (22) Then he breathed on them and said, "Receive the Holy Spirit.

Matthew also has it having been a trip up and back again:

[Mat 28:16-20 NLT] (16) Then the eleven disciples left for Galilee, going to the mountain where Jesus had told them to go. (17) When they saw him, they worshiped him--but some of them doubted! (18) Jesus came and told his disciples, "I have been given all authority in heaven and on earth. (19) Therefore, go and make disciples of all the nations, baptizing them in the name of the Father and the Son and the Holy Spirit. (20) Teach these new disciples to obey all the commands I have given you. And be sure of this: I am with you always, even to the end of the age."

The only gospel that has Jesus telling them to wait for him in Jerusalem, for Pentecost, until he sent the Comforter is Luke-Acts, so as Einstein said, "time is relative":

[Act 1:1-13 NLT] (1) In my first book I told you, Theophilus, about everything Jesus began to do and teach (2) until the day he was taken up to heaven after giving his chosen apostles further instructions through the Holy Spirit. (3) During the forty days after his crucifixion, he appeared to the apostles from time to time, and he proved to them in many ways that he was actually alive. And he talked to them about the Kingdom of God. (4) Once when he was eating with them, he commanded them, "Do not leave Jerusalem until the Father sends you the gift he promised, as I told you before. (5) John baptized with water, but in just a few days you will be baptized with the Holy Spirit." (6) So when the apostles were with Jesus, they kept asking him, "Lord, has the time come for you to free Israel and restore our kingdom?" (7) He replied, "The Father alone has the authority to set those dates and times, and they are not for you to know. (8) But you will receive power when the Holy Spirit comes upon you. And you will be my witnesses, telling people about me everywhere--in Jerusalem, throughout Judea, in Samaria, and to the ends of the earth." (9) After saying this, he was taken up into a cloud while they were watching, and they could no longer see him. (10) As they strained to see him rising into heaven, two white-robed men suddenly stood among them. (11) "Men of Galilee," they said, "why are you standing here staring into heaven? Jesus has been taken from you into heaven, but someday he will return from heaven in the same way you saw him go!" (12) Then the apostles returned to Jerusalem from the Mount of Olives, a distance of half a mile. (13) When they arrived, they went to the upstairs room of the house where they were staying. Here are the names of those who were present: Peter, John, James, Andrew, Philip, Thomas, Bartholomew, Matthew, James (son of Alphaeus), Simon (the Zealot), and Judas (son of James).