This time is unrated time. Rated time starts after completion of WOBC (when you are "trained"). This is supposed to be time you are acclimating to your unit and developing as an officer. See AR 623-3 and DA PAM 623-3.
I guess that's what comes with being given W01 out of WOCS. I was a "Candidate" until I completed my "Tech Course", which was two weeks or less after leaving Mother Rucker. Good luck and welcome to the WOPA.