Cant select especific element with one class

[LuyTester]

Currently, I have a calendar, all days had class ".day" but only de old once, have class ".day.old.disabled"
When I try to click on the cy.get(.day).contains("8").click() it clicks in the "28" that has class ".day.old.disabled" and that is not exclusive 8 it is a 28. I understand that when you what to add a class with more classes you can use * but not know if this is an issue or I'm missing something.-

How should I do it to avoid go first to the disabled.old ones?