Hello, brinuz. Welcome to the Apple Support Communities. You’ve come to the right place to get help with managing your events in the Calendar app. We know that being able to view your events normally must be important to you, and we’re happy to help you with this.
From what we gather, it sounds like the events import as expected at first, but you will notice that they do not appear in Calendar after some time. In a situation like this, there are several steps that we’d suggest starting with. Please review the following Apple Support articles first to be sure that you are importing your events following the suggested steps. You can also find tips to try if you are not seeing your events in the Calendar app:
Import or export calendars on Mac - Apple Support
If you don’t see your events in Calendar on Mac - Apple Support
If you use iCloud to manage your calendar events, it may also be helpful to check the iCloud website to see if your events appear there. This last article has more information to help with this:
Use Calendar on iCloud.com - Apple Support
We hope that the information in our reply here helps you gain access to managing your calendar again. Please reply back if you have any further questions or concerns.
Have a great day!
