This calendar shows classes 6 months at a time. It does not show Open Shop Hours but those happen Weds through Sun (1-9pm weds, 1-6pm thu-sun). If you want to sign up for a class that meets more than once, the link to sign up only shows up day of the first class (so find the first day of the class and you’ll see the link).
You can sort by class type, class name, instructor, class level, and even time of day (fancy!). If the sign up button is missing from the class, that class is full.