With rooted Android devices, create a local calendar database (without Google account / sync)
Following requirement matched / software needed
Rooted Android OS 4.4 or up
Sqliteman (Linux)
Copy /data/data/com.android.providers.calendar/databases/calendar.db to computer
Delete calendar.db-journal and calendar.db files from /data/data/com.android.providers.calendar/databases/ directory
Open calendar.db with Sqliteman
Open table ‘calendars’ from database ‘main’
Create a new record with following values:
_id:1
account_name: YOURNAME
account_type: LOCAL
dirty: 1 (don't know if needed)
mutators: com.android.providers.calendar
name: YOURNAME
calendar_displayName: YOURNAME
calendar_color: -13519129 (or your favourite)
calendar_access_level: 7000
visible: 1
sync_events: 0
ownerAccount: YOURNAME
canOrganizerRespond: 1
canModifyTimeZone: 1
canPartiallyUpdate: 0
maxReminders: 5
allowedReminders: 0,1
allowedAvailability: 0,1
allowedAttendeeTypes: 0,1,2
deleted: 0
Save the database
Copy calendar.db to /data/data/com.android.providers.calendar/databases/ on your device
Reboot your device (Important!)
Entries of tables in calendar.db
events
eventsrawtimes
instances
Easy way
Android app used to import and export calendar records and create an offline calendar database
iCal Import/Export