一日中を英語でなんと言うか？

all day long がわかれば、all morning long, all night long もわかります。他の言い方もありますが、all ナントカ　long が公式です。。 0:23 Born a poor young country boy, Mother Natures son all day long I'm sitting singing songs for everyone.

https://www.youtube.com/watch?v=XdBeDfGs4w4  4:14 we can look all the livelong day.
https://www.youtube.com/watch?v=QBKwTSBBn7U  0:02 I've been working on the railroad all the livelong day.

参考リンク
https://www.youtube.com/watch?v=QtpF37RQk_s  0:02 all morning long
https://www.youtube.com/watch?v=cXtS1k4hd4Y  0:41 all night long