dateutils.dzone(1) on Linux
The text c12cbf863721, as Debian 11 (Bullseye) shipped it.
Convert DATE/TIMEs between timezones.
Flags it lists
-
--base -
--from-locale -
--from-zone -
--help -
--input-format -
--next -
--prev -
--quiet -
--version -
-V -
-b -
-h -
-i -
-q