at all hours (of the day and night)

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at all hours (of the day and night)

At any time of the day or night. This phrase is usually said with a note of annoyance because something has happened at an inappropriate time. Please tell your girlfriend to stop calling our house at all hours of the day and night. I haven't slept in days—my neighbor's dog has been barking at all hours.
See also: all, and, hour

at ˈall hours

at any time during the night or day; all the time: He comes here at all hours, sometimes in the middle of the night.
See also: all, hour