Definitions by Informed Citizen

Uno De Juno 

Celebrated annually on the first of June, this is the largest and most important festival in Mexico's busy festival calendar. Though little known by non-natives, it is especially popular among New York immigrants from Mexico's former state of Alta California.

Him: "I'm going to Scott and Trac's Uno de Juno party this year. Are you?"
Her: "Of course! Isn't everyone?"

Uno De Juno by Informed Citizen June 3, 2007