You’re 100 correct. This was a massive issue last year. I know a lot of people provided that feedback to AWS and I hope they’ve adjusted the system.
This is one of the reasons I publish the guide and try to flag these key dates on social.
If AWS holds true to last year’s plan, they will be hosting a few webinars ahead of the scheduler opening to help explain the system. So please keep an eye out on Twitter by following @awscloud and @awsreinvent.