According to Reformed Theologians, when did the kingdom of God arrive?

**Q: According to Reformed Theologians, *when* did the Kingdom of God arrive? Pentecost? Jesus’ incarnation? Or the end of the age?** There is a translation debate about the verse saying “the kingdom of God is among/in you” so maybe that’s helpful to the debate?? NKJV: > Now when He was asked by the Pharisees when the kingdom of God would > come, He answered them and said, “The kingdom of God does not come > with observation; nor will they say, ‘See here!’ or ‘See there!’ **For > indeed,** **the kingdom of God is within you**.” Luke 17:20-21 NASB1995: > Now having been questioned by the Pharisees as to when the kingdom of > God was coming, He answered them and said, “The kingdom of God is not > coming with signs to be observed; 21 nor will they say, ‘Look, here it > is!’ or, ‘There it is!’ **For behold, the kingdom of God is in your > midst**.” Luke 17:20-21 But how do we compare Luke 17:20-21 with **Mark 1:15**? So the kingdom of God/Heaven is at hand, but it’s also in the Pharisee’s midst? We also read: > “Now after John was put in prison, Jesus came to Galilee, preaching > the gospel of the kingdom of God, and saying, “The time is fulfilled, > and ***the kingdom of God is at hand***. Repent, and believe in the > gospel.”” ‭‭Mark‬ ‭1:14-15‬ ‭ (Post edited)