Upcoming Events dates font & style

When customizing this section and using the preset fields in the Customizer dates are not displaying in the same style as on the DEMO page (month # on the top in a large regular font and date # below in a large bold font). Instead, it displays date # on the top in a large bold font and month # below in a tiny regular font. Also, buttons "But tickets" (or in our case "Register) are not displaying at all...we only see word "Register" but it doesn't have that button look. How can I adjust those with a limited knowledge of code? Thank you for your assistance in advance! https://battleoftheteal.org/