How to change type/font in Calendar

I've applied the following code to both  Content Editor and Script Editor web parts on the calendar page \calendar.aspx, but it doesn't appear to change any of the text for the calendar entries.

Not sure what I've missed?

<style type="text/css">
#msozonecell_WebPartWPQ2
{
font-size:40px !important;
}
</style>

I've used 40px so the changes would be immediately apparent, that won't be the actual type size.

Thank you,

Chad