Problem with WooCommerce calendar

Hello. I’m really struggling with this. I don’t understand how it’s happening. I use WooCommerce on my website so people can register for first aid training courses, but when you look at the top of the calendar it always says that the start date is whatever the current date is, as opposed to certain dates on the calendar I’m offering the course (20th and 25th).

Can anyone help me with this? I can’t seem to figure out how to get that start date at the top of the calendar to go away. It wasn’t there a few weeks ago when I last did some work on it.

calendar