B.C.'s Daylight Time Switch: The Sleep Science Alberta Ignored

VICTORIA, BC — As reported by CBC News, British Columbia will adopt year-round daylight time effective March 8, 2026, ending the province's decades-long practice of changing clocks twice annually. Premier David Eby announced Monday that the spring-forward shift will be B.C.'s last.

But the real story isn't the convenience—it's the circadian cost no one's talking about.

B.C. passed Bill 40 in October 2019, giving itself the legal runway to ditch seasonal time changes. The catch? The province pledged to wait for Washington, Oregon, and California to make the same leap, avoiding a time-zone fracture along the Pacific corridor. When the U.S. Senate passed the Sunshine Protection Act in March 2022—only to watch it die in the House—B.C. spent three more years in legislative limbo. Premier Eby's announcement effectively abandons that coordination strategy, accepting a permanent one-hour gap with any U.S. state that stays on standard time.

The 2019 public consultation showed 93% of British Columbians wanted to end the clock shuffle. What wasn't in that survey: the fine print on permanent daylight time versus permanent standard time. Sleep researchers have been sounding alarms for years. Permanent daylight saving time—the version B.C. just chose—means later sunrises, especially in winter. In December, Vancouver won't see dawn until after 9 a.m. For Calgary, which sits further east and north, a similar policy would push sunrise past 9:30 a.m.

The American Academy of Sleep Medicine, the Sleep Research Society, and multiple Canadian health experts have argued that permanent standard time aligns better with human biology. Morning light anchors the body's circadian rhythm, regulating everything from cortisol release to reaction time. Permanent daylight time floods evenings with light but starves mornings—creating what researchers call "social jet lag." Studies link this misalignment to increased rates of cardiovascular events, workplace injuries, and seasonal affective disorder.

Alberta has flirted with the same idea. In 2021, a provincial referendum showed 50.2% of Albertans wanted to ditch daylight saving time—a razor-thin majority with no follow-up legislation. Calgary's business community has historically favored alignment with B.C. for trade and travel simplicity. But if B.C. locks into year-round daylight time while Alberta sticks with the twice-annual switch, the Rockies become a temporal border every winter.

For Calgarians, the stakes are immediate. If Alberta follows B.C.'s lead without considering the standard-time alternative, winter mornings get darker, school commutes get riskier, and the province may be trading the annoyance of clock changes for a chronic sleep deficit. The convenience of never adjusting a clock is real. So is the biology of a 9:30 a.m. sunrise in January.