you mean the timestamp on the call?
if you stat your station when logged in, what network region are you in?
if you display ip-network-region X where X = your network region, do you have a location in the top left?
if you display location X where X is your location, is there a time offset for that location?
CM's server time is the reference time for the network. So, if your main server was in NY, it might be GMT -5 in Linux and your LA failover server might be GMT -8 in Linux, but in CM, the location for procr/the main server has time offset 0 and LA would have -3. It'd be up to your config to get subnets into regions into locations that align to that.