Unlock Sims 4 live-event rewards by patching your account data
Sims 4 Updater v2.5.0The game stores event rewards and progress in an accountDataDB.package file. By modifying that file you can trick the game into thinking you've unlocked all rewards.
Select your UserSetting.ini file from Documents > Electronic Arts > The Sims 4*. Your browser will download a patched accountDataDB.package — place it in the same folder.
* In some languages this folder is named differently: Die Sims 4, Les Sims 4, Los Sims 4, De Sims 4, etc.
Documents > Electronic Arts > The Sims 4. The file UserSetting.ini should be right there. If you don't see it, make sure you've run the game at least once. In some languages the folder is named differently (e.g. Die Sims 4, Les Sims 4).
accountDataDB.package. For ended events, the rewards only persist in offline mode. For live events, the rewards are tied to your EA account permanently once claimed online.
accountDataDB.package in the same folder as your UserSetting.ini — that's Documents > Electronic Arts > The Sims 4. If the file already exists, it will be replaced.
UserSetting.ini file, run the game once to generate a fresh one, then try again. The new file will only contain your current account.