How do I close my calendar when I receive spam?

To turn off spam in iphone calendar, follow these steps:

Operating environment: iPhone 13, iOS 15.7 system and setup app.

1. In the settings of the Apple phone, click the location of the Apple ID.

2. After the 2.Apple ID page opens, click the iCloud option.

3. Click the switch to the right of Calendar.

4. According to your own needs, click and select "Keep on my iphone" or "Remove from my iphone".

5. Mainly used to synchronize calendar schedule. If you don't want to keep the previously synchronized calendar schedule, you can select "Delete from My iphone" and keep the calendar closed.