Daniel 7:1
1In the first year of Belshazzar king of Babylon, Daniel had a dream and visions of his head while on his bed. Then he wrote the dream and told the sum of the matters.
In the first year of Belshazzar, Daniel sees a dream and writes the sum. Wesley: this prophecy is written in Chaldee, to be a monument to him, of the reverence his father and grandfather shewed towards God, who had done such mighty works for them. Then he wrote—these visions were recorded for the benefit of the church, to rectify their mistake: for they thought all things would succeed prosperously after they returned out of their captivity.
In practice: a night in a named year. The Most High records what the church will need. Return from exile will not mean ease. Common ground: written for the church, not a private diary, and not a modern prophecy chart.
Calvin: God had formerly appointed him interpreter to profane kings; he now appoints him a teacher to the Church. This vision was bestowed in the first year of Belshazzar, before that change. The faithful must be admonished of disturbances at hand; three monarchies yet remained. He wrote the dream for the common edification of the Church, not for himself personally.
Providence times the vision before Babylon falls. Daniel writes the vision down. God prepares his people for storms. The Most High still rules; this is.