TOPIC: Small project and cat F PDUs

Hello Cornelius and team,
I've just managed to finish a brief 3 weeks projects (elapsed) with a total of 48 hrs as PM.
How can I report PDUs cat F for this? Do I need to keep track of all the projects that I do in every cycle ( how long is a cycle, stated that l get my PMP® certification on September 3rd 2015?) and then report all the project during the cycle?

Thank you
Manlio

PDU cycles are three years. Keep track of your projects, of course, for record keeping, but once you generate the number of hours for the cycle, you cannot use new hours towards 60 credits.