A challenge goes through a few phases
Imminent (available/visible on the app, but not live yet)
Live (released, and taking entries)
Ongoing (usually 1-2 weeks after release)
Finishing (usually the last 1-2 weeks before completion)
Complete (challenge is finished, winners have been announced)
If you want to enter a challenge to have a chance of winning the cash prize, you need to enter it either when it’s imminent or live and accepting entries. Usually it’s imminent for ~2 weeks and then live for 1-2 weeks. After this point, you can still schedule this challenge in and submit before photos - but your chances of winning are very low, as many community members will have started the challenge already and be 1-2 weeks into the challenge. This will make it tough to catch up (but not impossible, if you’d really like to try!)
Remember, the real challenge is sticking to the workouts and becoming a healthier happier version of yourself! Furthermore, even if you schedule a challenge in the ‘ongoing’ state (after it’s officially stopped accepting entries), you will still be doing workouts that many others in the community have done very recently - so you can still join in the community spirit and share your journey with everyone. Especially if you have any questions about specific workouts, feel free to ask! You’ll have a lot of support from people who have just recently done these workouts, so will be able to help you.