Sorry but the "Great Commission of Matt. 28 started at Pentecost and is ongoing.
I dont think Matthew 28 started at Pentecost if anything Pentecost might have been fulfillment of several passages
[Luk 24:47-49 KJV] 47 And that repentance and remission of sins should be preached in his name among all nations, beginning at Jerusalem. 48 And ye are witnesses of these things. 49 And, behold, I send the promise of my Father upon you: but tarry ye in the city of Jerusalem, until ye be endued with power from on high.
[Act 1:8 KJV] 8 But ye shall receive power, after that the Holy Ghost is come upon you: and ye shall be witnesses unto me both in Jerusalem, and in all Judaea, and in Samaria, and unto the uttermost part of the earth.
They were at Jerusalem......they received the Holy Ghost
[Mar 16:15-17 KJV] 15 And he said unto them, Go ye into all the world, and preach the gospel to every creature. 16 He that believeth and is baptized shall be saved; but he that believeth not shall be damned. 17 And these signs shall follow them that believe; In my name shall they cast out devils; they shall speak with new tongues;
They were baptized........they spoke in tongues