Migrating from Baya V3 to V4
Calendar server integrated in Baya V4 and Baya V3 are the same. Calendar entries from Baya V3 are synced in Baya V4 automatically. So, no need to migrate calendar entries from Baya V3 to V4.
Migrating from Baya V2 to V3
With this release, you also get a new calendar server in which the limitations of the earlier calendar server have been resolved. To use the new calendar server, you will have to reconfigure the desktop and mobile calendar applications to use the new server as given here.
Also, the Calendar events in Baya V2 will have to be migrated to Baya V3, the steps for which are given here.
Migrating from Baya V2 to V4
Calendar in Baya V4 integrate with a separate server in which the limitations of the earlier calendar server have been resolved. To use the new calendar server, you will have to reconfigure the desktop and mobile calendar applications to use the new server as given here.
Also, the Calendar events in Baya V2 will have to be migrated to Baya V3, the steps for which are given here.