Sync the iOS Calendar and Reminders apps with the Disroot cloud.
This will allow you to check, update, and remove your events and reminders from any iOS device with an internet connection. Once it runs, and nothing breaks, you'll forget it's there.
cloud.disroot.org
For additional security, you may choose to use an app password instead of your main Disroot password. To do so, visit cloud.disroot.org. Once logged in, click your profile picture in the top right, click Settings, then click Security.
Now your calendar and reminders are added. If you now open the Calendar app you will see your calendars. If you would like, go to the Calendar and Reminders app settings to set your defaults to Disroot.