till all hours

till all hours (of the day and night)

Until a very late hour of the night or very early hour of the morning. Johnny keeps taking the car and staying out till all hours, and I just don't know what to do anymore! My boyfriend lives in another state, so to make up for the long distance, we stay up talking till all hours of the day and night.
See also: all, and, hour, till
Farlex Dictionary of Idioms. © 2022 Farlex, Inc, all rights reserved.

till (or to) all hours

till very late. informal
See also: all, hour, till
Farlex Partner Idioms Dictionary © Farlex 2017

till/until ˈall hours

until very late at night or early next morning: She sat up till all hours trying to finish her essay.
See also: all, hour, till, until
Farlex Partner Idioms Dictionary © Farlex 2017
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References in periodicals archive ?
They trawl the streets till all hours. The older generations tipped without thought.
One said: "The music is playing at all hours of the night." But a spokesman for Madge said: "Madonna does not stay up till all hours of the night.
In fact, I'm starting to think that was what the SFA meant when they said football was going back to its roots - players out on the swally, having fun till all hours of the morning then sneaking back in.
Yes, Freshers, you will get drunk and vomit in public places and stay up till all hours playing loud music and irritating the neighbours, but at the end of the day, do not forget that you are in the top two per cent of our population.
Complaints include: Playing her gramophone till all hours of the night (mainly Jimmy Shand with a bit of Eminem thrown in).