your addon need a little change to report correct server time.
You calculate the server time using only the UTC time but this is wrong because you don't take care of the daylight savings time.
In my country, Italy, the time zone is +1 but now we are also using the daylight savings time and at our normal current time we have added another +1 hour, so now we have +2 hour to add to UTC time.
This is very frustrating because when will occur another change of the daylight savings time I must remember to set the agent time again.
Please modifiy your addon so that this changes will be automatic. It's very simple to do.
If you will do this change I'll surely renew my subsciption in the next year, otherwise I'll find another better extension.