date(1) on Linux
The text 7036cfb58ac9, as Debian 2.2 (Potato) shipped it.
print or set the system date and time
Flags it lists
-
--date -
--file -
--help -
--reference -
--rfc-822 -
--set -
--universal -
--utc -
--version -
-R -
-d -
-f -
-r -
-s -
-u