eight o'clock
`` What I need is a card catalogue , '' said Patty . `` I never can remember which is which , I know . '' `` And I know another thing , '' said Adèle . `` If you girls do n't scamper off and dress , you wo n't be ready for dinner at eight o'clock . And there are lots of guests coming . And more this evening for the country dance . Now , disperse , all of you , and put on your prettiest frocks for Christmas Eve . ''