>PS What is the meaning of "(=>F)" that appears at the end of the >minibuffer?
I believe this means org has chosen the future option of an ambiguous input. e.g., it is December 10th. I use C-c . to create a timestamp and simply put in "9". The closest date that matches is December 9th, but there is a setting (I think org-read-date-prefer-future) that makes it prefer to choose a date in the future, so it is letting you know that it is opting for the future date instead of the closest date. I could be wrong, but that is my understanding.
