How do I transfer or sync all my calendar information from an iOS devices to an Android devices?

Basically Awesome Calendar works with whatever calendars you have set up in the device settings. It means that Awesome calendar is not able to sync its data with others directly so you have to sync the data via system calendar comes with your iOS devices or Android devices.

In case of iOS devices, you can find the settings at iPhone settings>Mail, Contacts, Calendars.
In case of Android, it depends on makers so cannot be specified but almost case there is a settings area for Mail, Contacts, Calendars.

If you set up the calendar account, Awesome calendar will sync them automatically.

FYI
In case of iCloud calendar, it is not possible to add your Apple ID to the Android settings, in this case you need to link your iCloud calendar with Google account so that your system calendar is able to sync iCloud calendar via Google.

If you do not know how to link your iCloud calendar with others, please refer next link.
iCloud: Share a calendar with others - Apple

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