Hello,

Thank you for contacting Infragistics Support!

I believe you will find the Custom label section of the Time Picker topic in our official documentation very helpful. As stated there the default label can be changed to a custom one by placing an igxlabel inside a <label> tag nested in the component. You can refer to the following sample I have created for you as well.

Please let me know if you have any further questions!

Best Regards,
Martin Evtimov
Associate Software Developer
Infragistics, Inc.