Sunny days mean margaritas.
At my house, though, we always take our margaritas up, in a cocktail glass—as opposed to on the rocks, which is how most people seem to drink them. I had my first margarita up back home in Austin in 1996. Drinking it this way means that it stays undiluted and has an elegant, almost creamy smoothness, which I love. I've never gone back.
Evidently margaritas were typically taken up back in the day, but somewhere in the ‘60s the trend changed. This is according to Joseph Mailander at the Cocktail Circuit, who has a delightful post on this topic so close to my heart. Shake and strain your next margarita--you won't go back either.