I've started some time ago a journey with SAP Fiori and first Fiori apps. It was not that smooth as I've expected, but now with experience received during that period I feel more and more comfortable with ...
... help for such external date. I will use today FM 'F4_DATE' to show the date popup and already know FM 'PERIOD_AND_DATE_CONVERT_OUTPUT' to convert internal date to external type.
Importing: ...
... find the field called "External date type" which is used to convert standard date to external one. If you're designing a program in which you want to use same functionallity then FM 'PERIOD_AND_DATE_CONVERT_OUTPUT' ...