Also set close time on ticket creation with close state.

app/models/observer/ticket/close_time.rb

@@ -1,24 +1,33 @@
 class Observer::Ticket::CloseTime < ActiveRecord::Observer
   observe 'ticket'
 
-  def after_update(record)
-#    puts 'check close time'
-
-    # return if we run import mode
-    return if Setting.get('import_mode')
-
-    # check if close_time is already set
-    return true if record.close_time
-
-    # check if ticket is closed now
-    ticket_state = Ticket::State.find( record.ticket_state_id )
-    ticket_state_type = Ticket::StateType.find( ticket_state.ticket_state_type_id )
-    return true if ticket_state_type.name != 'closed'
-
-    # set close_time
-    record.close_time = Time.now
-
-    # save ticket
-    record.save
+  def after_create(record)
+    _check(record)
   end
+
+  def after_update(record)
+    _check(record)
+  end
+
+  private
+    def _check(record)
+#      puts 'check close time'
+
+      # return if we run import mode
+      return if Setting.get('import_mode')
+
+      # check if close_time is already set
+      return true if record.close_time
+
+      # check if ticket is closed now
+      ticket_state = Ticket::State.find( record.ticket_state_id )
+      ticket_state_type = Ticket::StateType.find( ticket_state.ticket_state_type_id )
+      return true if ticket_state_type.name != 'closed'
+
+      # set close_time
+      record.close_time = Time.now
+
+      # save ticket
+      record.save
+    end
 end