GNOME Calendar keeps the focus on appointments rather than task management. Connect the calendars you need, give them recognizable colors and verify ownership before creating events that should appear in a shared or personal schedule.
Connect the calendars you actually use and give them recognizable colors before importing more sources. Check time zones when creating travel-related appointments and confirm account synchronization with a test event. Keep personal reminders separate from shared calendars when other people do not need the detail.
