Cambridge Bay time zone history
The Cambridge Bay zone has changed its standard time 4 times since 1970, tied for the most among the 20 zones in Canada. On standard time, clocks in Cambridge Bay run 13 seconds ahead of local mean solar time.
UTC−7
Standard time is UTC−7 (MDT/MST); clocks go forward to UTC−6 on the second Sunday in March and back on the first Sunday in November.
Summer time in 55 of 57 years since 1970
Before 1970
Standard time changes
| Date | Change | New standard time | Clock label |
|---|---|---|---|
| Before 1970 | |||
| January 1, 1920 | First local time in the record | UTC−7 | MST |
| Since 1970 | |||
| October 31, 1999 | Summer offset kept as standard time; clocks did not move | UTC−6 | CST |
| October 29, 2000 | Summer offset kept as standard time; clocks did not move | UTC−5 | EST |
| November 5, 2000 | Standard time back 1 hour | UTC−6 | CST |
| April 1, 2001 | Summer offset kept as standard time; clocks did not move | UTC−7 | MST |
Daylight saving periods
| Years | Clocks go forward | Clocks go back | Shift and labels |
|---|---|---|---|
| Before 1970 | |||
| 1942 | February 9 | not that year | 1 hour, MST to MWT |
| 1945 | not that year | September 30 | 1 hour |
| Since 1970 | |||
| 1972–1986 | last Sunday in April, 02:00 | last Sunday in October, 02:00 | 1 hour, MST to MDT |
| 1987–1998 | first Sunday in April, 02:00 | last Sunday in October, 02:00 | 1 hour, MST to MDT |
| 1999 | April 4 | not that year | 1 hour, MST to MDT |
| 2000 | April 2 | not that year | 1 hour, MST to MDT |
| 2001 | not that year | October 28 | 1 hour, MST to MDT |
| 2002–2006 | first Sunday in April, 02:00 | last Sunday in October, 02:00 | 1 hour, MST to MDT |
| 2007–2037 | second Sunday in March, 02:00 | first Sunday in November, 02:00 | 1 hour, MST to MDT |
Clock changes in 2026, 2027 and 2028
The clocks go forward 1 hour (MST to MDT) on March 8, 2026, March 14, 2027 and March 12, 2028 at 02:00 and back 1 hour (MDT to MST) on November 1, 2026, November 7, 2027 and November 5, 2028 at 02:00, local time.
Also on UTC−7
Fort Nelson (Canada), Dawson (Canada), Dawson Creek (Canada), Whitehorse (Canada), Vancouver (Canada), Boise (United States), Denver (United States), Phoenix (United States), Ciudad Juárez (Mexico) and Hermosillo (Mexico) (nearest first; 1 more on the list of offsets).
Clocks next door since 1970
- Resolute (712 km): usually 1 hour ahead; different on 508 days in 1972–2026.
- Rankin Inlet (910 km): usually 1 hour ahead; different on 375 days in 1972–2026.
- Inuvik (1,149 km): same time except 3,984 days in 1970–1979, 1999–2001 and 2026; 1 hour ahead today.
- Pituffik (Thule) (Greenland) (1,413 km): usually 3 hours ahead; different on 4,187 days in 1972–2026.
- Fort Nelson (1,423 km): usually 1 hour behind; different on 2,354 days in 1970–2026; same time today.