To change the Kendo UI Scheduler recurrence editor header title, use the configuration below:
headerTitle: "Custom Message"
It seems that we have omitted this configuration setting in our documentation. You may find it on the 1872nd line of the kendo.scheduler.recurrence.js file in the src/js folder of our commercial distribution. Thank you for bringing this to our attention and please accept my apology for any inconvenience caused. I have logged this as an issue so you will be able to track its completion at: