two o'clock
`` Colin Casey died . '' Harry shook his head . `` Only man in the system that held the Galactic Medal of Honor . Presidential proclamation , everybody in the system is to hold five minutes of silence for him at two o'clock , Sol Time . You know how many times that medal 's been awarded , Lootenant ? '' Before waiting for an answer , Harry added , `` Just thirty-six times . '' Don added dryly , `` Twenty-eight of them posthumously . ''