On Open Day, all team members present what they did in the month out of their own initiative. What features did they make or what documentation they wrote, or test cases, or a new product, or a new marketing initiative. It could be anything that adds value to ERPNext.
All the Open Day presentations are made public on the erpnext blog.
This also means Open Sourcing our management. So look forward to our presentations at the end of the month and follow us to understand how this experiment is working out for us.