I have just looked at my phone as if a customer to make sure I have the correct days closed etc. and just an observation I think would improve the customer experience.
Is it possible to have a darker colour like dark blue which works well with yellow rather than white in the available dates as I found the dates hard to read.
Also I have had a few people come back and say I couldn’t book is it full, when actually the class is not available on those dates. A suggestion would be to just put a cross through the dates unavailable or a pop up box to say class closed on this date.