You're work on this series is commendable and really good. I find it a good exercise to read through my Bible as I follow along with what you're saying. From my own notes: The Day of the Lord ("the day of YHWH") is always a day of judgment. There have been several "days of the Lord," each followed by a message of future restoration and hope, but there will be a final "Day of the Lord" reserved for final judgment.