1 November. Bristol announced a legal sellout of its 30,000 available seats on 9 September, ten days before the scheduled race date. Charlotte also had oversold tickets and has a legal sellout. Initially, all support races were held behind closed doors, but Bristol and Charlotte allowed spectators for their Xfinity races, and Texas allowed spectators for the Truck race as it was the undercard on the same day as the Cup race. All support races permitted spectators by October, as Texas, Talladega, and Kansas allowed spectators in recreational vehicles parked in lots overlooking the track or some infield sections for camping access to races where grandstands were closed. 2021 season NASCAR announced the 2021 Cup Series schedule on 30 September, the 2021 Xfinity Series schedule on 30 October, and the 2021 Camping World Truck series schedule on 19 November. Some of its race dates were originally introduced during the pandemic, specifically the spring meeting at Darlington for all three top series (which actually flipped lineages as Darlington moved the September race lineage back to the spring, and vice versa). The Talladega playoff race was added for the second consecutive year for the Xfinity Series (it was removed at the end of the 2022 season). Also, NASCAR kept pandemic restrictions in place by announcing only eight weekends would feature a full slate of practice and qualifying, which were the Daytona 500, Coca-Cola 600, the five weekends on new circuits or changed layouts (the March Bristol meeting, on dirt, Austin, Nashville, Road America, Indianapolis on the road course), and the November Phoenix championship round. All other meetings would use the pandemic format of no practice or qualifying with grids set by the competition formula implemented starting with the first August Daytona round. When the Bristol spring meeting qualifying was cancelled, NASCAR used the competition formula to determine the starting order, a permanent change from the traditional use of owner points. The Daytona meeting carried a limit of about 30,000 of estimated 101,500 grandstand seats offered to spectators. On 8 December 2020, it was announced that Auto Club Speedway in California will not host a race for the Cup and Xfinity series in 2021 due to increasing California state restrictions, and will be replaced by the Daytona Grand Prix which will swap dates with the Homestead–Miami Speedway race for logistics reasons. All three national series will race at the Daytona Road Course, with