cal(1) on OpenBSD
The text 8def4876020e, as OpenBSD 7.0, OpenBSD 6.9, OpenBSD 6.8, OpenBSD 6.7, OpenBSD 6.6, OpenBSD 6.5, OpenBSD 6.4, OpenBSD 6.3, OpenBSD 6.2, OpenBSD 6.1 shipped it.
displays a calendar
Flags it lists
-
-j -
-m -
-w -
-y