at the top of the hour

at the top of the hour

Fig. at the exact beginning of an hour. (Alludes to the big hand on a clock pointing to the 12. Often heard on television or the radio. See also at the bottom of the hour.) Every class in my school starts at the top of the hour. Our next newscast will be at the top of the hour.
See also: hour, of, top
References in periodicals archive ?
The duo will return to the stage for the final hour of the show, themed "Birthday Party," with looks at the top of the hour from the online retail company Piperlime starting at 7:00 p.
Flights depart at the top of the hour beginning at 7 a.
Three games will be played, each starting at the top of the hour, with the first beginning at 6pm.
I think we should keep in and put a 'strong language' warning at the top of the hour.
It should have led the local nightly news, and been breaking news at the top of the hour on CNN.
The Comcast Holiday Spectacular will be shown daily for the public at the top of the hour, seven days a week, from 10:00 a.
The free 15-minute show occurs at the top of the hour, 10:00 a.
The flights, which depart at the top of the hour, are part of a significant hub schedule enhancement that includes three new cities receiving TWA jet service.
Shuttles will depart at the top of the hour from the Brooklyn Street side of the casino, and make return trips at half past the hour from the main gate for the Grand Prix located on Jefferson Avenue.
The express service will depart at the top of the hour, seven days per week, from both the WCC terminal and BWI Airport.
Service from Maplewood Mall, Signal Hills Shopping Center and Oakdale Center will operate hourly, at the top of the hour.
When the line-up is initialized at the top of the hour, the playlist is downloaded to the TCS90.
For the very first time BBC program formats will match American radio schedules with fixed newscasts at the top of the hour and on the half hour," said Jerry Timmins, BBC World Service Regional Head for the Americas.