To see all of your past and declined (and cancelled) events in a list:

1. Go to your Howbout calendar by tapping on the calendar icon (🗓️) at the bottom of the screen
2. Tap the list icon in the top right hand corner of the screen
3. You'll be able to view your upcoming, past and declined events in a list format. You can also search your events by tapping the magnifying glass in the top right hand corner.