How to change font size for days of week

I am using Modern Tribe’s The Events Calendar plugin. After updating today to version 3.5.1, the font size for the days of the week appearing across the top of my calendar is too large.

I am using the following code to change the size of the font for names of events appearing on my calendar and it works well.

#tribe-events-content .tribe-events-calendar div[id*=”tribe-events-event-“] h3.tribe-events-month-event-title {

font-weight:normal !important;

font-size:11px !important;
}

Is there similar code that can be used to change the font size for the days of the week on my calendar? https://lithuanianmha.org/calendars/. I’d like to make the font smaller so that the days of the week fit on one line.

Any ideas would be appreciated.

https://www.ads-software.com/plugins/the-events-calendar/