all hours

*all hours (of the day and night)

Fig. very late in the night or very early in the morning. (*Typically: until ~; till ~; at ~.) Why do you always stay out until all hours of the day and night? I like to stay out till all hours.
See also: all, hour

all hours

Irregular times, as in You can't come home at all hours and expect your supper to be ready. The expression can also mean "late at night," as in College students like to stay up talking until all hours. It is sometimes amplified into all hours of the day and night. [c. 1930]
See also: all, hour
References in periodicals archive ?
For most employers, a covered employee must be paid overtime for all hours over 40 worked in a given week.
Under this method, the employee must be paid a salary designed to compensate the employee for all hours worked, and the employee must work a fluctuating number of hours of overtime every week.
Of course, most long-term care facilities can take advantage of Section 7(j) of the FLSA, which allows them to base overtime compensation on work in excess of eighty hours in a fourteen day period, provided they also pay overtime for all hours worked in excess of eight in any given day.
3 Consequently, the average hours at work as a percent of all hours paid per employee rose.
The West Hills resident trades online and at all hours of the day - and night - because he needs to be at his job at KCRW-FM in Santa Monica by 3 a.
Taylor and thousands of investors like him are taking part in a technology revolution that has made it possible for them to trade stocks at all hours of the day from their home computers.