Oh, you want date and time?
The ‘F’ (Expression) is as follows:
Format("{0}-{1}-{2} {3}:{4}:{5}", Y, M, D, h, mm, s)

time_date_2020Sep15c.gh (12.6 KB)
(re-posted because Eval input names are not case-sensitive, causing confusion between ‘M’ and ‘m’)