l would like to know if now possible to allow some of my clients to have access to internet betwen the hours of 9pm and 6am on daily basis and for a period of 1 week or 1 month. Am using usemanager and hotspot on the same machine INTEL PC
Yes you can. It has always been possible - using simple queues with hotspot or via the usermanager.
If usermanager 4.x, create a profile with validity of 7d or 30d as you wish and then assign 2 different limitations to the profile. One limitation sets allocated data rate (tx and rx) for 9pm to 6am and second limitation sets 0 data rate (eg 1k/1k) for the remaining hours.
If your limitation as at hospot level, then set simple queues using the same principle.