Hi Juan,
Thanks for taking the time to reach out! While we don’t offer a way to check tickets against the current date for multi-day events at this time, you can achieve this type of setup by simply creating three different tickets for your event (day 1, day 2, and both days) and checking the ticket type manually when scanning tickets at the door. Check-ins with Event Tickets Plus are one-time-only, so if a day 1 ticket is checked in once, the same ticket will return an error if it is scanned again on day 2.
You can learn more about check-ins and how they work with Event Tickets Plus (including information on what happens if a checked-in ticket is scanned a second time) on our Knowledgebase here:
https://theeventscalendar.com/knowledgebase/managing-your-orders-and-attendees/#navigating-attendees
Does that help to answer your question here? Let me know if you should have any other concerns or if I can clarify anything for you! 🙂 Thanks again!