一九九九年九月四日联合报笫33页有「一周一成语」，也以day and night(中文译作「夜以继日」)为例，并造句：

Mary knitted day and night to finish the sweater before her mother's birthday.在母亲生日前，玛利夜以继日的完成了这件毛衣。(杨长江)

2000年一月七日中国邮报 (China Post) 头版有一则新闻报导：James Soong (宋楚瑜) and his running mate Chang Chau-hsiung (张昭雄) also extended gratitude to some 6000 volunteers who had worked day and night binding the petitions(连署书).

美国克林顿总统在电视演讲中不只一次地说过day and night.英国首相布莱尔在2000年二月三日正午12：05在CNN 谈话中也说过day and night.但在页556，Rewey Belle Inglis等着Adventures in American Literature中，作者在介绍美国着名散文作家及诗人爱默生的一篇名为Compensation(补偿)的散文时说：The idea of balance in human life ﹣
   
night and day, good and evil, action and repose ﹣ was a favorite of his.

在页700，A Complete Dictionary of English Phrases (Shanghai: Commercial Press, 1925)中的例句：The earth moves night and day.

另在页472，Dictionary of Current English Idioms(Tokyo: Kenkyusha Limited, 1975)中的例句：. . . as night follows day.

在以上文句及两本字典中均用night and day, 为甚么?

day and night是口语，非正式英文(informal English); night and day是文语，

正式英文 (formal English)。正如中文中有「夜以继日」(night and day) 及「日以继夜」(day and night)一样。「夜以继日」是成语，而「日以继夜」是误用。后来以讹传讹，而成了我们平日脱口而出的「日以继夜」