NCM Fathom Events, OâReilly Auto Parts and Golden Boy Promotions are celebrating Cinco de Mayo with a mega fight LIVE from the MGM Grand in Las Vegas. May Day: Mayweather vs. Guerrero plus Ponce De Leon vs. Mares will be broadcast LIVE to movie theaters nationwide on Saturday, May 4 at 9:00pm ET/8:00pm CT/7:00pm MT/6:00pm PT/5:00pm AK/3:00pm HI. May Day: Mayweather vs. Guerrero brings boxingâs Pound-for-Pound King as he steps up to defend his WBC Welterweight Title against Robert âThe Ghostâ Guerrero. This is set to be a gargantuan showdown between two future Hall of Famers who always bring excitement and fierce competition every time they step into the ring. Plus, donât miss the WBC Featherweight World Champion Daniel Ponce De Leon take on former Bantamweight and Super Bantamweight World Champion Abner Mares in a fight that will be sure to pull any sports fan out of their seat.