Changing text size in calendar events feed

Changing text size in calendar events feed

I'm new to yodeck, but I'm stumped on how to change the text size on the events calendar feed.  We are trying to use 2 iterations of the widget to display a menu calendar by day and the daily activities and both show fairly small text. I can adjust the colors but not the size.  
Any way to change this?
The image below is an example of a test layout.