O sorry, forgot: You need to so this on a Textfield, not a numbersfield.
And, the quotes in my code were correct but in your Quote of my text, the are wrong!
Correct:
Wrong:
time('DD:hh:mm', $value)
And see the BLL App settings for more format codings, goto Coding and scroll all the way down for all time formats (which are not completly the same as date formats.
