Hi Marissa,
No, the tutorial would only apply to the big calendar. To get it to apply to the widget as well you’d need to make some similar modifications. Unfortunately I cannot really guide you on that. I can tell you that to modify the widget you’ll want to make a copy of /wp-content/plugins/the-events-calendar/views/events-list-load-widget-display.php and place in an ‘events’ folder in your theme to make changes.
I hope that helps!
– Jonah