[FIXED] [S] [DU] Holidays days off cause issues with classes/ No final exam

Product: The Sims 4
Platform:PC
Which language are you playing the game in? English
How often does the bug occur? Often (50% - 99%)
What is your current game version number? 1.58.63.1010 (64bit)
What expansions, game packs, and stuff packs do you have installed? All of them. (No, really, every single one)
Steps: How can we find the bug ourselves? Have a Sim who has a class with a final exam such that their last day of class before term ends is on the day before the last day of the term, not the last day of the term.
What happens when the bug occurs? Sim has MWF class when last day of the term is on Tuesday or Thursday, or Tuesday Thursday class when last day is on a MWF. Sim does not take final exam in their last class before the end of term, even though they go to class.
What do you expect to see? Sim taking the final on their last day of class before the term ends, even though that's the day before the actual last day of the term.
Have you installed any customization with the game, e.g. Custom Content or Mods? Not now. I've removed them.
Did this issue appear after a specific patch or change you made to your system? Yes
Please describe the patch or change you made. Installing Discover University

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I had two Sims in the household taking classes.  These two sims each had one of their classes that was a final exam class with a MWF schedule, but the last day of the class term was a Tuesday.  Both of them went to their Monday class as normal, came back from the Monday class without having taken the final.  The Monday was a regular day, not a holiday of any kind.  So they both got bad grades in those two classes for not taking the final, even though they did go to all their classes and did all their homework.  In the previous term these same two sims had finals on the last day of the term, and took finals normally, including the moodlets associated with them.

Update:  The next term I had one Sim who was in the same situation, and he took his final this time, so I've downgraded the occurence to "often" and I'm adding this comment.  There were no "stay home from work/school" holidays this time (there was Love Day, but they all go to school for that, and it prompted them to go to uni classes) so I am starting to think the holidays have something to do with this, too.

@crinrictThe one holiday during the term was on a Saturday, so it shouldn't have mattered, but I'm glad you asked!

Edited to add:  Wait, no, I lie  Winterfest was right at the start of the term. I thought Winterfest was before the term started, but right after I posted this I went and looked back at the calendar to make sure I was right about what days things fell on.  Winterfest  was the  first full day of that term.  But I made them go to class anyway, by manually clicking the go to class button.  Neither of them ever missed a class.

Product: The Sims 4
Platform:PC
Which language are you playing the game in? English
How often does the bug occur? Occasionally (10% - 49%)
What is your current game version number? 1.58.63.1010
What expansions, game packs, and stuff packs do you have installed? All
Steps: How can we find the bug ourselves? Attempt a term during a week which includes a holiday that disables work/school(IE Winterfest)
What happens when the bug occurs? Holiday that disable work/school appear to disrupt the class schedule. 3 sims attended class on the Friday following Winterfest but none received the 'cram/stressed' moodlet, none received credit for taking the final, and all received homework in those classes. They subsequently received 'fail' grades in those Friday classes only.
What do you expect to see? Holidays should not disable classes or weeks with holidays could feature a Saturday class to make up for the 'lost' time.
Have you installed any customization with the game, e.g. Custom Content or Mods? Not now. I've removed them.
Did this issue appear after a specific patch or change you made to your system? No

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I have successfully graduated 2 sims prior with no issue, but none attended class with weeks with a holiday. These three affected sims are in the same household living in a Foxbury dorm. My seasons are set at 14 day length and this is their second term. This is the first holiday I have experienced in the dorm that disables work/school schedules. Other holidays(Love Day for example) have not caused this issue.