school night

noun

1. any night of the week that precedes a day of school
2. humorous.
   any night of the week that precedes a day of work

Example Sentences

That evening was school-night again, and Mr. Fabian was interested in hearing if Martha had proved satisfactory.

From Project Gutenberg

It was school-night, but the men were up for fun, so gave the Doctor a holiday.

From Project Gutenberg