I know of two ways by which the time on the IP Phone 7941 can be changed.
1. go to call manager os admin and set the time and restart the CCM.
2. create a date/time group, associate it with device pool and associate the ip phone with that device pool.
The first option is last resort. The second option does not work ( I dunno why )
Is there any other way of changing time on the IP Phone 7941 ?