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date
The program accepts the following options. Also see 2. Common options.
date
executable many times can
be considerable.
The argument timespec specifies the number of additional terms of the time to include. It can be one of the following:
If showing any time terms, then include the time zone using the format `%z'.
If timespec is omitted with `--iso-8601', the default is
`auto'. On older systems, GNU date
instead
supports an obsolete option `-I[timespec]', where
timespec defaults to `auto'. POSIX 1003.1-2001
(see section 2.5 Standards conformance) does not allow `-I' without an
argument; use `--iso-8601' instead.
TZ
environment variable were set to the string `UTC0'.
Normally, date
operates in the time zone indicated by
TZ
, or the system default if TZ
is not set. Coordinated
Universal Time is often called "Greenwich Mean Time" (GMT) for
historical reasons.
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