Remember these slangs about"Sunday":

Sunday best , Sunday clothes , Sunday togs , Sunday-go-to-meeting clothes——高档、漂亮的衣裳；盛装。
Sunday run——长距离。
Sunday painter——业余画家。
Sunday punch——（拳击中）最厉害的一击；（对付对手的）杀手锏。
Sunday saint——伪善者。
Sunday saint and Monday sinner——假道学，伪君子。
Sunday letter——（历书上为表示一年之星期日所用的）主日字母。
Sunday school——（教堂中所设的）主日学校。（美）扑克牌戏。
Sunday school truth——众所周知的道理或事实。
Month of Sundays——很久。
Mid-Lent Sunday , Mothering / Refreshment Sunday——（牛津大学）校庆日前的星期日。
Low Sunday——业余的；复活节后的星期日。
To look two ways to find Sundays——斜着眼看。

for example: Mary , a well-known Sunday painter's girl Friday , went to the art exhibition in her Sunday best yesterday and made a hit with all the gentlemen there who seemed to have Sunday-go-to-meeting manners .