been thinking of changing the length of all semesters; for my own game. which resources would I need to change?

when I get Seasons, I plan to do something similar for all seasons. which resources control that?

The length of a semester (72 hours + length of final exam) is controlled via a BCON, see any of the mods that change this (eg Faster Uni) for details

The number of semesters in a year (2) and the number of years in a course (4) are hard-coded, but with a small amount of effort can be changed (eg 3 Year Uni and Semester Changes)

The length of a season (5 days) is configured via a BCON, see post #4 here for a discussion

have made my semester mod.

the group in the linked thread; it seems to be missing a number; 0x7f232ab. 5 "numbers" after "0x7f" instead of 6.

found the group a number of days ago; it is 7f232aba.
and BHAV 1001 links to the mentioned BCON.

created my season mod.
only change needed was to the BCON.

updated my semester mod.