[root@hzmc ~]# date
Thu Dec 24 01:15:44 EST 2009
[root@hzmc Asia]# more /etc/sysconfig/clock
# The ZONE parameter is only evaluated by system-config-date.
# The timezone of the system is defined by the contents of /etc/localtime.
ZONE="America/New_York"
UTC=true
ARC=false

[root@hzmc America]# ls /usr/share/zoneinfo/Asia/
Aden       Bahrain     Chungking  Harbin     Kamchatka     Macau        Phnom_Penh  Riyadh89   Tbilisi        Urumqi
Almaty     Baku        Colombo    Hong_Kong  Karachi       Magadan      Pontianak   Saigon     Tehran         Vientiane
Amman      Bangkok     Dacca      Hovd       Kashgar       Makassar     Pyongyang   Sakhalin   Tel_Aviv       Vladivostok
Anadyr     Beirut      Damascus   Irkutsk    Katmandu      Manila       Qatar       Samarkand  Thimbu         Yakutsk
Aqtau      Bishkek     Dhaka      Istanbul   Krasnoyarsk   Muscat       Qyzylorda   Seoul      Thimphu        Yekaterinburg
Aqtobe     Brunei      Dili       Jakarta    Kuala_Lumpur  Nicosia      Rangoon     Shanghai   Tokyo          Yerevan
Ashgabat   Calcutta    Dubai      Jayapura   Kuching       Novosibirsk  Riyadh      Singapore  Ujung_Pandang
Ashkhabad  Choibalsan  Dushanbe   Jerusalem  Kuwait        Omsk         Riyadh87    Taipei     Ulaanbaatar
Baghdad    Chongqing   Gaza       Kabul      Macao         Oral         Riyadh88    Tashkent   Ulan_Bator

[root@hzmc America]# cat /etc/sysconfig/clock
# The ZONE parameter is only evaluated by system-config-date.
# The timezone of the system is defined by the contents of /etc/localtime.
ZONE="Asia/Chongqing"
UTC=true
ARC=false

[root@hzmc America]# date
Thu Dec 24 14:43:33 CST 2009