Notably, this Chronology shifts from using the civil Tishri to Elul calendar to the biblical Nisan to Adar calendar. The motivation is threefold: first, because God explicitly states that Nisan will be the first month for Israel (Ex. 12:1–2); second, because in the context of Shmita cycles and jubilees, Tishri is regarded as the seventh and not the first month (Lev. 25:8–9); and third, because historical types and shadows of the Abomination of Desolation have occurred in the mid-summer to mid-winter timeframe, rather than the mid-winter to mid-summer timeframe (while many focus on the Passover season in this regard, historical occurrences have occurred in the opposite half of the year: think both Temple destructions, Av 9, Antiochus/Hanukkah, the Nazi Wannsee Conference, etc).

In the document below, you can scroll to the right to see additional notes and references. Maranatha!