Page-specific style

I’m not sure if the title made enough sense, but is there some way that I can have a table look differently, based on the page that’s calling it?
For example, here’s what I mean:
This is the “main calendar” for what I mean: http://dev.rosss.ca/calendar/
If you click “July”, you’re taken to that month, and below the calendar, it calls the same table: http://dev.rosss.ca/2019july/
However, what I think would be better would be if on the month’s pages, the table could be smaller.
Thank you!