Like yes, in the Hebrew Calendar, we traditionally consider Nisan the "first month" in terms of numbering, yet the new year begins on 1 Tishrei and that's when we change the year number over from 5782 to 5784 etc. It seems weird.
Except, we literally also have that with the Gregorian Calendar here in America? Sure, January 1st is when we change the year from 2022 to 2023; and Greg does at least number January as "1" for that reason; but in terms of how American society actually functions, the new year begins on July 1st, or perhaps some time in late August early September, or perhaps in October. Because 7/1 is the Fiscal Year that actually drives how everything in society functions and turns over and shit and how institutions do all their planning and stuff around for when to begin and end things. That or we have the academic year which people live according to for the first 18 to 21 years of their life if not more depending on their career trajectory. Plus there's the Federal Fiscal Year.
Nisan is numbered as #1 because that's traditionally, when this calendar was created, what was basically the beginning of the "fiscal year" for Jews. It didn't make sense to start new budgets and stuff on Rosh Hashanah for the same practical reason as to why we don't usually do that on New Year's Day on Greg's calendar. Just, you know, back then the "fiscal year" was more like the "farming year"
