date(1) on Linux
The text fa4a09c97e2c, as Debian 10 (Buster) shipped it.
print or set the system date and time
Flags it lists
-
--date -
--debug -
--file -
--help -
--iso-8601 -
--reference -
--rfc-3339 -
--rfc-email -
--set -
--universal -
--utc -
--version -
-I -
-R -
-d -
-f -
-r -
-s -
-u