Change date-time format

Hi. 

I need to be able to handle the format of the dates but I don't see anywhere how to do it nor do I see something similar in the forum.

I have to get the hour and minute of sunrise and sunset in label format hh:mm but the Sun application returns the value in the format dd/mm/yyyy hh:mm:ss.

Has anyone managed to manage the time formats?

I would appreciate any suggestion.

Thank you