Using the Calendar from the command line.
fasti list calendars
fasti list events
fasti list events -n 7
fasti list events -s 2022-02-01
fasti list events -o report
fasti list events -o table
cal -3
fasti add event 'bike ride' 2022-01-09T10:00
fasti del event 'bike ride' 2022-01-09T10:00
make install