Asaph, living in the time of David, was one of the ten elders of Jerusalem and a prophet [1 Chronicles 15:19). He is attributed with several Psalms, including 50 and 74. He speaks of the Day of Judgment, the arrival of the Messiah (Mashiach), and the coming of the Messianic Age.
Psalm 50:15: Call to me on the day of distress and I will free you, and you will honor me.
Psalm 74:19-21: Do not give the soul of your Turtledove to a nation [of idolaters]; do not forget the nation of the poor forever. Look to the Covenant, for the dark places of the earth are filled with dens of violence. Let not the downtrodden one turn back in disgrace; the poor and needy will praise your name.
If Jesus represents the coming of the Messiah, does this not mean we are in the Messianic Age?
However, there is also the Second Coming. Is this a second Messianic Age, a continuation of the first (with the Incarnation), or does Jesus's appearance "not count" as an ushering in of the Messianic Age? To my knowledge, there is little to no evidence from the Hebrew Bible (essentially the Old Testament) on what the Messianic Age would look like in human terms, but it seems clear those following Jesus in his ministries were "walking with God" as other prophets, such as Isaiah, suggeat as part of the Messianic Age.