Dear Ungsumalee Jenpitukchat,
Your calendars and reminders have been restored successfully on May 19, 2016, 6:23 AM PDT. The restored calendars and reminders archive will appear on all your devices. Your previous calendars and reminders have been archived.
If you had shared calendars or reminders, you will need to share them again or ask their owners to share them.
If you had scheduled events, they will be canceled and recreated, and invitations reissued. The scheduled event invitees will first see a cancellation and then a new invitation.
The iCloud Team