output of "current time" minus "given time"

Is this what needs to be done ?

 
given "hour:minute"
(date of "hour:minute" not important, does not need to be calculated)


example of given "hour:minute"
assign 06:00 (hour:minute),CST(-6:00) to variable S.


then

assign date("now-6:00","hour:minute") to variable N.

out put varible N minus Varible S.

thanks for your time and help.

<perl> out date("now-06:00", "Hour:Minute"); </perl>

this works. ;-)

Or do you need sth. else?

$given="03:00"; out date("now-$given", "Hour:Minute");

or do you want the result of $time1 - $time2 ? thats not possible with the "date" function. (it is possible if you program it yourself, but its not easy)