This article is based on a single source, a Register report on a Canadian Medical Association Journal review. The topic is public health and time policy, not compute or hardware; no connection to this section is implied.
The review finds that permanent daylight saving time (pDST) would prolong winter morning darkness, which disrupts circadian rhythms. Morning light is needed to reset the body's 24.2-hour internal clock; evening light delays it, harming sleep, mood, learning, and productivity. Studies cited include residents on the western edge of US time zones getting about an hour less sleep per week, and an extra hour of sleep per week being tied to roughly 5% higher long-term earnings.
The review says the preponderance of evidence favors permanent standard time, aligning with sleep societies' recommendations. The US Senate passed pDST in 2022 but the House did not; now the House has passed a bill and the Senate is hesitating. President Trump has pressured a holdout senator. The US tried pDST during WWII and in 1973-74, and repealed it after public backlash over dark mornings. Russia and Chile also adopted and then reversed pDST.