While Turretin’s argument that Jesus is the Messiah may not convince many Jews, he does have an interesting discussion of prophetic day = year theory. As such, he is within the Reformed spectrum and ably presents the foundations for a Reformed eschatology (279ff). The background is Daniel 9.
Ezekiel 4:6 ( I have appointed thee a day for a year, even a day for a year.) notes the connection between day and year. Some could object that this is pertinent only to Ezekiel’s prophecy, but a better case can be made that this is prophetic calculation (otherwise, the statement is manifestly false, which is impossible). It cannot read literally, since seventy weeks do not quite make a year and a half, and as Turretin notes, it “little suits so illustrious a prophecy.” (see also Rev. 12:6’ 13:5)