Mexican professional wrestling promotion Empresa Mexicana de Lucha Libre (EMLL) celebrated their 42nd anniversary with three professional wrestling major shows centering on the anniversary date in mid to late September. The third EMLL 42nd Anniversary Show took place on October 3, 1975, in Arena México, Mexico City, Mexico to commemorate the anniversary of EMLL, which over time became the oldest professional wrestling promotion in the world. The Anniversary show is EMLL's biggest show of the year.

The 1975 Anniversary show commemorated the 42nd anniversary of the Mexican professional wrestling company Empresa Mexicana de Lucha Libre (Spanish for "Mexican Wrestling Promotion"; EMLL) holding their first show on September 22, 1933 by promoter and founder Salvador Lutteroth. EMLL was rebranded early in 1992 to become Consejo Mundial de Lucha Libre ("World Wrestling Council"; CMLL) signal their departure from the National Wrestling Alliance. With the sales of the Jim Crockett Promotions to Ted Turner in 1988 EMLL became the oldest, still-operating wrestling promotion in the world. Over the years EMLL/CMLL has on occasion held multiple shows to celebrate their anniversary but since 1977 the company has only held one annual show, which is considered the biggest show of the year, CMLL's equivalent of WWE's WrestleMania or their Super Bowl event. CMLL has held their Anniversary show at Arena México in Mexico City, Mexico since 1956, the year the building was completed, over time Arena México earned the nickname "The Cathedral of Lucha Libre" due to it hosting most of EMLL/CMLL's major events since the building was completed. Traditionally EMLL/CMLL holds their major events on Friday Nights, replacing their regularly scheduled Super Viernes show.

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