This is an simple example to calculate the hours:
/* rexx */
date1 = '12 Oct 2006'
time1 = 9
/* use "date2 = DATE()" for current date */
date2 = '13 Oct 2006'
/* use "time2 = time('H')" for current time */
time2 = 11
date1 = DATE('B',date1)
date2 = DATE('B',date2)
datediff = date2 - date1 - 1...