Hi there, Liza! Welcome to the forums. 🙂
What’s odd is that your calendar is defaulting to December when it should default to the current month, regardless if there are events in the current month or not. Very strange!
I notice there are several errors when inspecting your site in the console, so that makes me wonder if there is a conflict with your theme or possibly another plugin that is causing the issue. Will you please try the steps in our Testing for Conflicts Guide?
Give those a shot and let me know what you find. I’m hoping this will help us pinpoint where the issue is coming from.
Cheers!
Geoff