diff options
| -rw-r--r-- | doc/sh-utils.texi | 17 |
1 files changed, 10 insertions, 7 deletions
diff --git a/doc/sh-utils.texi b/doc/sh-utils.texi index 1cf4f0d37..525901394 100644 --- a/doc/sh-utils.texi +++ b/doc/sh-utils.texi @@ -2479,16 +2479,14 @@ Append the hours, minutes, and seconds. @end table If showing any time terms, then include the time zone using the format -@samp{%z}. If @samp{--utc} is also specified, use @samp{%Z} in place of @samp{%z}. @item -R @itemx --rfc-822 @opindex -R @opindex --rfc-822 -Display the time and date using the RFC-822-specified +Display the time and date using the RFC-822-conforming format, @samp{%a, %_d %b %Y %H:%M:%S %z}. -If @samp{--utc} is also specified, use @samp{GMT} in place of @samp{%z}. @item -r @var{file} @itemx --reference=@var{file} @@ -2509,11 +2507,16 @@ Set the time and date to @var{datestr}, See @samp{-d} above. @opindex -u @opindex --utc @opindex --universal -@cindex coordinated universal time +@cindex Coordinated Universal Time +@cindex UTC @cindex Greenwich Mean Time -Print or set the time and date in Universal Coordinated Time instead of -in local (wall clock) time. - +@cindex GMT +Use Coordinated Universal Time (@sc{utc}) by operating as if the +@env{TZ} environment variable was set to the string @samp{UTC0}. +Normally, @command{date} operates in the time zone indicated by +@env{TZ}, or the system default if @env{TZ} is not set. Coordinated +Universal Time is often called ``Greenwich Mean Time'' (@sc{gmt}) for +historical reasons. @end table |