Prom and graduation not show on calendar

Product: The Sims 4
Platform:PC
Which language are you playing the game in? Czech
How often does the bug occur? Every time (100%)
What is your current game version number? 1.90.375.1020
What expansions, game packs, and stuff packs do you have installed? All of them
Steps: How can we find the bug ourselves? I removed all mods and CC from the game, but I still didn't have prom and graduation on my calendar. So this is game bug. Prom and graduation only showed up when I completely turned off aging for all Sims.
What happens when the bug occurs? Prom and graduation did not show on my calendar.
What do you expect to see? I expect so see prom and graduation on my calendar.
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. I bought HSY.

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I removed all mods and CC from the game, but I still didn't have prom and graduation on my calendar. So this is game bug. Prom and graduation only showed up when I completely turned off aging for all Sims. My sim got to the prom, it also asked me if I wanted to go there. At the graduation, I was not asked at all, I had to click on "go to the event" in the calendar. But the problem is when I had twins or more Sims in the household - only one Sim and some NPCs "received" the diploma at the ceremony - so only one Sim had that photo in the inventory. However, they did not actually receive the diploma at all, it was neither in the inventory nor arrived by post.