gcal
A Program for Printing Calendars
Gcal is a program for printing calendars. Gcal displays a calendar for a month or a year, eternal holiday lists, and fixed date lists. The program correctly omits the dates that were skipped when the current Gregorian calendar replaced the earlier Julian calendar.
There is no official package available for openSUSE Leap 15.6Distributions
openSUSE Tumbleweed
SUSE SLE-15-SP1
Unsupported distributions
The following distributions are not officially supported. Use these packages at your own risk.