Fort Benning/OSUT graduation?

My husband is currently at Fort Benning for OSUT. I'm wondering if there is one basic training and when it takes place (9weeks/14weeks). The only reason I'm asking is because he told me what unit he is in but when I looked up graduation info on the Fort Benning website his unit and "expected" graduation day don't match up. Also who is all allowed to attend family day? Are brothers, sisters, aunts, uncles?? Will he have any time off after graduation? Thank you in advace for any information you provide!