If you have the Date and Time source column it should produce the below. You can use the syntax if you are trying to create your own date and time field. However, is there a need? Let me know if I'm off point.
A quick way is to quickly make another source list of one column as a complex type Date and Time field. SharePoint Lists allow this to be fast. Then you import that data source, and copy all the controls to your own destination. Then you can remove the datasource. Let it build that for you.
Otherwise copy the syntax directly in the controls.
Minutes Items
["00","01","02","03","04","05","06","07","08","09","10","11","12","13","14","15","16","17","18","19","20","21","22","23","24","25","26","27","28","29","30","31","32","33","34","35","36","37","38","39","40","41","42","43","44","45","46","47","48","49","50","51","52","53","54","55","56","57","58","59"]
Hours Items
["00","01","02","03","04","05","06","07","08","09","10","11","12","13","14","15","16","17","18","19","20","21","22","23"]
Update (DataCard)
DateValue2.SelectedDate + Time(Value(HourValue2.Selected.Value), Value(MinuteValue2.Selected.Value), 0)
(Its numbers so its just adding)



