midnight
Neither of the units had made top honors as a result of their fight and the trial , and having to spend so much time on guard duty , but they had passed and that was the most important thing . The boys all adjourned to the credit exchange and gorged themselves on Martian fruit pies covered with ice cream . Finally the party broke up when Tom remembered that he and his unit mates had to go on guard duty in half an hour . `` Well , '' said Tony Richards , rising , `` we relieve you guys at midnight , so we might as well hit the sack right now . I 've been waiting for this night for a long time . '' `` No study , '' sighed Davison . `` What heaven !