session timeout eval random only during night hours

[Krzysztof Drewicz]

Hello,

basically what i have is:

Session-Timeout = 24*60*60 (secons so = one day)

what i whould like to eval this timeout every time user gets ack/ok reply
to be (randomly) in hours let's say 0200 - 0600 hours.

any quick hint? Don't want to reinvent the wheel or use some cannons to
shut at butter fly.

maybe someone has some advice?

thanks.