Canada's official time


Learn about the time keeping systems used by the NRC and the science behind time measurement

Get the time

Web clock

The official time in your time zone, according to the NRC's atomic clocks

Sunset and sunrise calculator

Sunrise and sunset times and hours of illumination for a given date for select Canadian cities

Radio time signal broadcast (CHU)

Information about the NRC's continuous shortwave radio broadcasts of the time, system status updates

Computer time and date

NRC time codes to keep your computer's time and date current

Network time protocol (NTP)

Information on using network time protocol to get the most accurate time information for your computer

Telephone talking clock

Access to the NRC's telephone talking clock

CBC radio daily time broadcast

Get Canada’s official time via CBC radio

Science behind time measurement

NRC Official Time

Satisfy the requirements for time at all levels of precision

Time zones and Daylight saving time

Information about Canada's six time zones

Leap second

Learn about the significance of the leap second in accurate time keeping

Global Positioning Data (GPS)

Information about how NRC uses GPS to intercompare frequency standards with those of other national laboratories

Frequently asked questions

Answers to common questions about time, dates, and time keeping