Wiktionary
day after
n. the next day.
Usage examples of "day after".
And on the night of the third day after his decease (perchance because earlier he might not) he made his appearance, according to his promise, in Meuccio's chamber, and called Meuccio, who was fast asleep, by his name.
It is just that the female half has never gone out of its way to make life hell for me, day after day for years, even though one or two women, too, have done me dirt.
By what the papers say, I figure the last missing people only got thrown into the day after tomorrow.