About GMT UTC CST and Linux time zone settings

GMT is GMT, UTC is the universal Time, GMT and UTC are the same time

Beijing time is East eight district, namely Gmt+8 or utc+8

Cst:central Standard Time (CST) is 6 hours behind coordinated Universal time (UTC). This time zone was in use during standard time in: North America, central America.

See: HTTPS://WWW.TIMEANDDATE.COM/TIME/ZONES/CST

Supposedly cst=utc-6.

However, CST has no meaning in the time zone environment variable TZ in Linux.

The format of TZ is:

set TZ=TZN[+|-]HH[:MM[:SS]][DZN]

TZN: Three-letter time zone name.
HH:UTC and local time difference , optionally with the symbol.
MM: minutes, separated by a colon (:) and HH.
SS: Seconds, separated by a colon (:) and mm.
DZN: Three-letter daylight time zone such as PDT.

In fact TZN and DZN can be any 3 letters, as long as the middle of the time difference is set correctly .

For example: Export tz= ' CST-8 ', where CST can write any letter, the key is-8, the system is to think your current time minus 8 hours is Greenwich Standard Time,

It's just east eight, so it's usually written when we set up the Beijing time zone, but it can actually be written as export tz= ' abcd-8 ', and the timing is right, and the key is the time difference and +-sign .

About GMT UTC CST and Linux time zone settings