The Derby 20 you are likely referring to is the Kentucky Derby, which in 2025 is scheduled to take place on Saturday, May 3, 2025. The event will be held at Churchill Downs in Louisville, Kentucky. The post time for the race is 6:57 p.m. Eastern Time. Twenty horses have the chance to compete in the race, which is the first leg of horse racing's Triple Crown. Additionally, if you were referring to the Epsom Derby or other Derby races, the Epsom Derby is traditionally held on the first Saturday of June each year—in 2025, that would be June 7, 2025. If you meant something else by "Derby 20," please clarify, but the information above covers the major well-known Derby events in 2025.