Just a Matter of Time

Every year, as we “spring forward” and “fall back,” we participate in a ritual older than most of our modern conveniences. Daylight Saving Time was born in an era when candles lit the evening hours and coal powered the world’s engines. It promised thrift, efficiency, and a clever stewardship of daylight. But as our society has changed, so too has the evidence about what this practice actually does to us—and to our economy.

Recent research paints a clearer picture. And like many things in life, the truth is more complex than the slogans that surround it.

DST has long been defended as a way to save energy and boost economic activity. Yet modern studies show that the energy savings once imagined simply do not materialize. In fact, the opposite often occurs. A major natural experiment in Indiana found that DST increased residential electricity consumption, costing households about $9 million per year, with additional pollution costs between $1.7 and $5.5 million annually. The reason is simple: while people may use less lighting, they use more air conditioning and heating. Our modern systems respond more to temperature than to daylight.

DST does, however, nudge people toward more evening activity. As one economist notes, extended daylight encourages people to “go out more often,” usually in cars—boosting consumer spending but also increasing carbon emissions. In other words, DST may stimulate certain kinds of economic behavior, but it does so at a cost.

The most sobering findings come from the spring transition. Losing an hour of sleep may seem trivial, but the data tell a different story.

Studies show that the shift to DST disrupts sleep and internal rhythms enough to cause measurable harm. Heart attacks rise after the spring change, and worker productivity declines—not for a day or two, but for up to two weeks.

A detailed analysis of global GitHub activity found that early morning work suffers significantly during this period, with workers struggling to regain their footing.

These disruptions ripple outward: reduced productivity, increased errors, and higher accident rates all carry economic consequences. When multiplied across millions of workers, the cost is substantial.

Permanent standard time avoids these transition related losses entirely. It aligns more closely with solar time, supports healthier sleep patterns, and eliminates the costly spring shock to the body and the economy. It does not offer the bright winter evenings that many people enjoy, nor the bump in evening consumer activity. But it does offer stability—biological, social, and economic.

All of this raises a deeper question: “What does it mean to steward our time well?” Scripture reminds us that time itself is a gift—“Teach us to number our days, that we may gain a heart of wisdom” (Psa 90:12). Wisdom does not rush. It does not force the body to obey the clock when the body is telling the truth about its limits.

The economic evidence suggests that our twice yearly clock changing experiment may not be serving us as well as we once hoped. The gains are modest; the losses are real. And perhaps that is a reminder that human flourishing is not achieved by squeezing more activity into the evening or by manipulating the hours of light, but by living in harmony with the rhythms God has woven into creation. Morning follows night. Work follows rest. Light follows darkness—not because we legislate it, but because God orders it. Maybe the most faithful posture is not to bend time to our will, but to receive it as it comes.