Removing the name of the "month" at the top of full Calendar

Does anyone know where I can simply remove the name of the month on top of the full calendar on a page? I need to use a specific font and in my case the name of the month is TOO small:

Here’s my example:

https://www.paulsiebert.net/ps/events/

Thank you. If it’s in the code and I can remove it for each month that would rock.

https://www.ads-software.com/extend/plugins/events-manager/