A lot of businesses run bookings where the dates are already decided, tattoo artists with flash day events, personal trainers running bootcamp weekends, makeup artists for bridal seasons, photographers doing holiday sessions. The client doesn't need to browse a calendar. There are 4 dates, just showing the available slots as buttons under each date makes much more sense than showing the entire monthly calendar. It's too cluttered and not needed at all.

A simple layout, with title and date as a header, time slots as buttons, booked ones grayed out — would convert so much better for these date specific offers.