Hi Leo,
There isn’t a perfect way to do something like that at the moment, although you do have some options. You could make a multi-day event and specify the exact times in the event description. Then people would buy a ticket for the whole event. Another option would be to have three separate event entries (which would allow different times) and allow customers to buy a ticket for the whole thing on only one event page.
I’d love to have you both add your votes to our UserVoice forum thread in favor of adding more random recurring event options. Hopefully we’ll be adding this feature in a future build.
Best,
Leah