For example, if I have meeting scheduled for Jan. 30, 2024 but it got cancelled, how do I remove this event from my calendar?
Lastly, is there a way to modify existing events?
For example, if I have meeting scheduled for Jan. 30, 2024 but it got cancelled, how do I remove this event from my calendar?
Lastly, is there a way to modify existing events?
There's a set of instructions here for using GNOME Calendar.
Specifically to your question, to delete an appointment right-click on the appointment in the calendar and select Delete Appointment, or click on the appointment and click Delete in the tool bar or press Ctrl+D. If you are in the list view you can also use Edit ▸ Delete Appointment.
To modify or rather edit an appointment: