High School Years Prom Not Showing in The Sims 4? Here’s How to Fix It

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So… your teen spent all week hyping up Prom, you planned the outfit, maybe even staged a dramatic promposal — and then nothing. No calendar event. No “Go to Prom.” No graduation either.

Yeah. It’s not just you.

If you’re dealing with High School Years prom not showing, Sims 4 prom disappeared, or even Sims 4 graduation missing, this guide will walk you through exactly what’s going on — and how to fix it fast.

Let’s get your teen back to dancing under those pixel disco lights.

Why Is High School Years Prom Not Showing?

When players search “why did prom disappear in Sims 4?”, the answer usually falls into one of three categories:

1️⃣ Outdated Mods (Most Common)

If you use mods, this is the #1 cause.

Prom and Graduation are calendar-based events. Mods that touch:

  • Story progression
  • School gameplay
  • Event scheduling
  • Aging systems
  • UI/calendar tweaks

…can accidentally break Prom.

MC Command Center (MCCC) is frequently involved — especially if it’s not updated for the current patch.

Even if you removed mods, leftover cache files can still cause issues.

2️⃣ Patch Regression (Actual Game Bug)

Sometimes, it’s just the game.

After major updates, players often report:

  • Sims 4 prom not in calendar
  • Prom shows up but disappears instantly
  • Graduation never triggers
  • “Ask to Prom” interactions missing

If this happens in a completely vanilla save (no mods installed), it’s likely a High School Years bug.

3️⃣ Save File Glitch

Older or heavily played saves can lose scheduled event data.

If Prom works in a new save but not your main one, the save itself may be corrupted.

How to Fix High School Years Prom Not Showing

Follow these steps in order. Don’t skip ahead.

✅ Step 1: Repair The Game

Before anything else:

  1. Open EA App
  2. Go to The Sims 4
  3. Click Repair

Let it fully complete before launching again.

This fixes missing High School Years files.

✅ Step 2: Do the “Vanilla Test” (This Is Important)

This is how you figure out if it’s a mod problem.

  1. Move your entire Mods folder to your desktop.
  2. Delete:
    • localthumbcache.package
  3. Launch the game.
  4. Start a brand-new save.
  5. Create a fresh teen Sim.
  6. Wait until Saturday.

If High School Years prom not showing still happens here → it’s likely a real game bug.

If Prom appears normally → you’ve got a mod conflict.

✅ Step 3: The 50/50 Mod Method

If Prom came back in the vanilla test, here’s how to find the culprit:

  1. Put half your mods back.
  2. Launch the game.
  3. Check if Prom appears.
  4. If broken, remove half again.
  5. Repeat until you isolate the problem mod.

Common offenders:

  • Outdated MCCC
  • Event overhaul mods
  • Teen school gameplay mods
  • Aging/story progression tweaks
  • Calendar UI mods

Always update mods after every patch.

✅ Step 4: Clear Cache Properly

After removing mods:

Delete:

  • localthumbcache.package
  • The cache folder
  • The onlinethumbnailcache folder

Restart your PC before testing again.

This step fixes a surprising number of “Sims 4 prom disappeared” cases.

Fix for Sims 4 Graduation Missing

If Prom works but Sims 4 graduation missing is your issue:

Make sure:

  • Aging is enabled.
  • Your Sim ages naturally (not forced in CAS if possible).
  • They are actively enrolled in high school.
  • No aging or progression mods are active.

Graduation usually triggers the Sunday after aging up.

If graduation doesn’t appear in a brand-new vanilla save, you’re likely dealing with a High School Years graduation bug.

When It’s Actually a High School Years Bug

If Prom and Graduation are missing in:

  • A brand-new save
  • With zero mods installed
  • After repairing the game

Then yes — it’s likely a patch regression.

At that point, the best move is reporting it properly.

Quick Bug Report Template

Use this format when posting on EA Forums:

Title: High School Years Prom Not Showing / Graduation MissingPlatform: PC / Mac / Console
Game Version: (From main menu)
Packs Installed: High School Years (+ others)Mods/CC: None (Tested vanilla)Issue:
Prom does not appear in calendar.
Graduation ceremony does not trigger.Steps:
1. Start new save
2. Create teen
3. Wait until weekend
4. Prom missingWhat I Tried:
- Repaired game
- Cleared cache
- Removed mods
- Tested new save

The clearer your report, the better.

FAQ – Quick Answers

Why did prom disappear in Sims 4?

Usually mod conflicts or a recent patch affecting calendar events.

How do I fix prom not showing Sims 4?

Repair the game, test vanilla, then isolate mod conflicts using 50/50.

Does MCCC cause prom not happening Sims 4?

Outdated versions can interfere with event scheduling.

Why is Sims 4 graduation missing?

Aging settings, mod conflicts, or a High School Years bug.

Final Quick Checklist

✔ Repair game
✔ Delete localthumbcache
✔ Remove all mods
✔ Test brand-new save
✔ Use 50/50 method
✔ Update MCCC
✔ Report if vanilla still fails

Prom disappearing is frustrating — especially when High School Years is literally built around it. But the good news? In most cases, it’s fixable within 10–20 minutes once you pinpoint whether it’s mods or a patch issue.

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