Mitel 6915 User Manual page 204

Time Zone Name
TR-Istanbul
TT-Port of Spain
TW-Taipei
UA-Kiev
US-Eastern
US-Central
US-Mountain
US-Pacific
US-Alaska
US-Aleutian
US-Hawaii
UY-Montevideo
VA-Vatican
YU-Belgrade
Time Zone Code
EET
AST
CST
EET
EST
CST
MST
PST
AKS
HAS
HST
UYS
CET
CET