Huawei
Manage Displayed Calendar Accounts auf Huawei
When the Calendar app on your Huawei phone shows appointments from an account you don't use anymore, or hides events from an account you rely on, the cause is almost always the list of accounts enabled for calendar display.
By default, EMUI shows two accounts in Calendar: the local phone account and the Google account chosen during initial setup. Any account you add later, such as a second Google account or a work account, also appears here and can be toggled independently.
Where to enable or disable calendar accounts
Open the Calendar app ➔ Open the menu ➔ Tap on Manage accounts ➔ Enable or disable an account.
Turning an account off only hides its events from the calendar view. It does not delete the account or remove its data from the phone. Turning it back on restores the events within a few seconds, as long as the phone has an active connection.
This toggle only controls what Calendar displays. If events from an account are still missing after you enable it, check that account's own sync setting under Settings ➔ Accounts to confirm calendar sync is switched on for that specific account.