I'm no expert on this module but I guess that the delta calculated by DateCalc($dateA,$dateB,\$err,$mode) will be 1 buisness day when you feed your program 13:00.

This is probably "misunderstod" by Delta_Format which interprets it like "He wants to know how many hours one day is" and gives you 24 hours.

You could probably fix this by creating your own version of Delta_Format that splits the delta in its pieces (separated by colons) and make your own interpretation of what they mean (ie. 1 day = 8 hours).


/brother t0mas