全球市区划分，参考wiki图片。

 

我们平时所见UTC+08:00，意指8 hours ahead of Greenwich Mean Time, an identifier for a time offset from UTC of +08:00. In ISO 8601 the associated time would be written as 2012-05-22T06:13:05+08:00.

CST指China Standard Time (Beijing Time),

西方国家通常含有两个时间：一是UTC偏移时间，二是daylight saving time (延后一小时)。

 

 

 

 

CST

Chinese Standard Time

Central Time Zone

The Central Time Zone consists of a time zone in parts of Canada, the United States, Mexico, Central America, some Caribbean Islands, and part of the Eastern Pacific Ocean that use clocks setfive hours behind Coordinated Universal Time (Greenwich Mean Time - GMT) during daylight saving time (DST) and six hours behind GMT otherwise.

GMT

Coordinated Universal Time (Greenwich Mean Time – GMT)

 

UTC

Universal Time

 Coordinated Universal Time

 

CET

Central European Time

Central European Time (CET), used in most parts of the European Union, is a standard time that is 1 hour ahead of Coordinated Universal Time (UTC). The time offset from UTC can be written as +01:00. The same standard time,UTC+01:00, is also known under other names.

Central Time

Central Standard Time

 

EDT

Eastern Daylight Time

Eastern Daylight Time (EDT) is four hours behind Greenwich Mean Time and is observed during daylight saving time for eight months each year in the Eastern Time Zone (North America). It begins on the second Sunday in March, when clocks are advanced from 2:00 a.m. EST to 3:00 a.m. EDT. It ends on the first Sunday in November, when clocks are moved back from 2:00 a.m. EDT to 1:00 a.m. EST.