@gnosticabyss I don't mind at all, in fact I should have added this for you too, it explains all about how to post in the bug forum:
https://answers.ea.com/t5/Bug-Reports/INFORMATION-How-does-this-forum-work/td-p/7368632
I had a look and found an existing bug report for your calendar problem here:
https://answers.ea.com/t5/Bug-Reports/OPEN-S-Holidays-Only-Appearing-for-Three-Sims-in-Household/td-p/13153076
So all you need to do is go to page 1 and on the very first bug report click the Me Too button. You can add a Reply too and it should immediately give you a bug template to fill in, but sometimes it doesn't. If it doesn't give you the bug template to fill in here's a blank one to cut and paste into a reply, I've filled a few fields in for you already:
Product: The Sims 4
Platform: Xbox Series S
Which language are you playing the game in?
How often does the bug occur? (Delete as appropriate) every time 100%, often 50%-99%, occasionally 10%-49%, rarely 0%-9%
What is your current game version number? 1.82
What expansions, game packs, and stuff packs do you have installed?
Steps: How can we find the bug ourselves?
Have you installed any customization with the game, e.g. Custom Content or Mods? On console never used.
Did this issue appear after a specific patch or change you made to your system? Yes
Please describe the patch or change you made: Patch 1.82
When there's a bug in your game that you can't find a report for, go to the Sims 4 and then Bug Reports and select New Topic and start your own bug report, just one per issue. If it already has a bug report you didn't find, that's fine someone will probably merge it with the existing one for you.
If you click Subscribe to Replies in the bottom right hand corner you'll find out when it's fixed and when other players add comments and tips to work around the bug.
If you're not sure of anything just ask, good luck.