Hi Alex,
Thanks so much for reaching out and for your interest in our products!
With Events Calendar PRO, you can use the recurring events feature to create one event that has multiple dates, even if that date does not have a pattern. It would look something like this in the Edit Event screen:

If you would not like all of these events to show in your Events List Widget or something similar, you could mark certain events as Featured Events and only display those events, or only display events in a certain category or tag.
$89 includes Events Calendar PRO, along with access to our premium support forums. Additional add-on can be added at an additional fee.
Please let me know if you have any other questions!
Thanks,
Jaime