Canadian shortwave station CHU is scheduled to go off the air on the 22nd of June. The station delivers the nation's official time from a transmitter site southwest of Ottawa, broadcasting on 3.33, 7.85 and 14.67 MHz, allowing listeners in Canada and around the world to synchronize their clocks on Coordinated Universal Time. The service is run by the National Research Council and transmits the time via digital voice in English and French.

The time-signal radio station makes use of atomic clocks on the premises, which are checked against atomic clocks based at the council headquarters.

Canada first began transmitting the time under the CHU callsign in 1938. The station began its transmissions earlier in the decade as VE9OB. Its announcements are in Coordinated Universal Time, a change made in 1990 after decades of transmitting in Eastern Standard Time.

In making the announcement of the station's shutdown, the NRC said that official time-keeping will be delivered instead by three more modern methods - via its telephone talking clock and, using the Internet via its Network Time Protocol and its web clock.