On May 28, 2021, WWE announced that SummerSlam would take place live on Saturday, August 21, marking the first SummerSlam to be held on a Saturday since the 1992 event (which was pre-taped on a Saturday and aired on tape delay on a Monday), as well as the first SummerSlam to not be held on a Sunday since the 1994 event, which took place on a Monday. During the 2021 Belmont Stakes' pre-race show on June 5, the Allegiant Stadium in the Las Vegas suburb of Paradise, Nevada was confirmed as the host venue for SummerSlam. While WWE typically hosts PPVs on a Sunday night, the "Wrestling Observer Newsletter" reported that it was the Allegiant Stadium that wanted SummerSlam held on a Saturday. This marked the second SummerSlam to be held in a football stadium, with the foremost being the 1992 event at Wembley Stadium in Wembley, London, England, but the first to be held in a National Football League stadium in the United States. Travel packages became available on June 11 while individual tickets went on sale on June 18. In addition to traditional PPV and the WWE Network, SummerSlam aired in movie theaters across the United States, thus marking WWE's first pay-per-view event to air in theaters in the country.