Mexicans and Parties We all know that Mexicans love to party, or as we call it, have a fiesta. Any excuse will do! Our cousin is moving to live abroad? Fiesta. He's back? Fiesta. The family's old spinster is getting married? Fiesta. Our niece finished her studies? Fiesta. Is it Friday? Fiesta. Is it Wednesday? Fiesta. In other words, we have more than enough excuses to celebrate with our families and friends.