These functions take numeric arguments and return numeric values that
represent times.
— Function: TIME.DAYS (ndays)
Returns a time corresponding to ndays days.
— Function: TIME.HMS (nhours, nmins, nsecs)
Returns a time corresponding to nhours hours, nmins
minutes, and nsecs seconds. The arguments may not have mixed
signs: if any of them are positive, then none may be negative, and
vice versa.