Roughly 2-4 months...
Teams typically spend approximately 2-4 months planning, designing and building a solution to their Challenge. Teams usually meet at least once a week to work on their solution, but the exact schedule is determined by the team.
The 21-22 Challenges will be released on September 1, which is when many teams will choose to begin their work. You can see previews of this year's Challenges here.
Most local tournaments fall in late February and early March. Use our Locations page to learn more about your local tournament schedule.