Just found carl, a modern version of cal (the unix calendar utility that prints a tabular view of months).
What stands out for me here is the ability to highlight events from calendar files.
This is superb in conjunction with vdirsyncer, which I’ve been using for a long time for exactly the purpose of having a local directory of .ics files for each of my Nextcloud DAV calendars.
https://github.com/b1rger/carl
Also featured in my link log: https://blog.jutty.dev/links