Today was actually one of a whopping 10 shutoff days that have been held this year:
January 14: Nuevo Laredo; Rio Grande Valley
March 26: Mexicali
July 14: Ciudad Juárez; Tecate, BC
September 24: Monterrey and 7 small towns
October 29: Torreón, Coah.; Cuernavaca, Mor.; San Luis Río Colorado, Son.
December 11: Saltillo, Coah., León, Celaya, Querétaro, and some Sonora
December 16: Most of Jalisco, Michoacán, San Luis Potosí and a bunch of Coahuila
December 17: Central Mexico including Mexico City, Puebla, Toluca and Pachuca
December 22: All of Zacatecas, most of Durango, some Chihuahua, Coahuila, Sonora and Quintana Roo
December 31: 240 stations in all but a handful of states (big exception: Chiapas)
Some low-powered stations, particularly those in rural areas or owned by cash-strapped public broadcasters, can remain on air through the end of 2016.