How do I stop a calendar at December 2020?

Site URL: https://www.siftswirl.com/

Hi!

My client has 2 requests that I'm not sure how to accomplish:

1. Wants calendar to stop at December 2020 (calendar is shown on the Order page)
2. There will be 2 types of events added to the calendar: Available days and Not Available days. Is there a way to make these 2 different colors when shown on the calendar? I was only able to figure out how to change the days with events to the green color, but not with 2 different colors.

URL is siftswirl.com
Password is cookies

Thanks in advance y'all!