twelve o'clock
They commence by treading under foot the pleasantest half of life , and then they impose their bad habits on their victims . Ottilia ! Ernest ! I do insist upon having lights extinguished in the child 's apartments by twelve o'clock at midnight . ' ` Twelve o'clock is an extraordinary latitude for children , ' said Ottilia , smiling . The prince , with a scarce perceptible degree of emphasis , said , ` Women born to rule must be held exempt from nursery restrictions . ' Here the conversation opened to let me in .