NASCAR Cup Series 2023 7 2023-03-12 2023-03-12 https://r2.thesportsdb.com/images/media/event/thumb/kk2uyo1674305388.jpg https://r2.thesportsdb.com/images/media/event/poster/5lhd5x1674304814.jpg The United Rentals Work United 500 is a NASCAR Cup Series stock car race held annually at Phoenix Raceway in Avondale, Arizona since 2005. It is one of two Cup Series races at the track, the other being the Season Finale 500. With the new 2010 NASCAR start time rule change that starts races only at 1:00 pm, 3:00 pm, and 7:30 pm Eastern Time, track officials were concerned that the new start time (45 minutes earlier than in the past) would put the majority of the race in the day instead of the planned night. At that time of year in Phoenix, sunset takes place at roughly 7:00 pm MST (because Arizona does not observe daylight saving time, this is the same as Pacific Daylight Time). As a result, the race was stretched to 600 km (372.8 mi) so that the extra 100 km (62.1 mi) would take place during the day, and most of the race would still take place at night as planned. However, in 2011, the race moved one week after the Daytona 500 in February. The race returned to 312 laps and was run on Sunday in the daytime for the first time. In 2015, Phoenix moved from the second to the fourth race of the season in mid-March. 1676604