time zones

Argentina 0
Australia - Western Area - Parth +11
Australia - City Center - Port Darwin +12
Australia - East Melbourne/Sydney +13
Austria +4
Belgium +4
Canada - West Zone - Montreal/Ottawa/Quebec -2 
Canada - Central - Winnipeg -3 
Canada - Mountain Zone - Regina -4 
Canada - Pacific Zone - Vancouver -5
Chile -1 
China +11 
Czech Republic +5 
Denmark +4 
Ecuador -2 
Egypt +5

France +4 

Germany +4
Great Britain +3

Greece +5 
Hungary +4 
Israel +5 
Italy +4 
Japan +12 
Mexico -3 

Netherlands +4 
Norway +4 
Panama -2 
Paraguay -1 
Peru -2 
Philippines +11 
Poland +4 
Portugal +3 

Romania +5 
Russia (Moscow) +6 

Slovakia +4
South Africa +5
Spain +4 
Sweden +4 
Switzerland +4 
Turkey +5 

United States - West Zone

[Boston/Philadelphia/New York/Washington] -2 

United States - Center Zone

[Chicago/New Orleans] -3 

United States - Mountain Zone

[Salt Lake City] -4 

United States - Pacific Area

[San Francisco] -5 

Uruguay 0 
Venezuela -1 
Yugoslavia +4