Twice a year we repeat the same ritual: moving the hands of the clock, checking the microwave, setting the alarm clock. A small gesture that changes our routine and that, for decades, they said promised savings that almost no one sees anymore. Although this year could be one of the last. Pedro Sanchez has announced that the Government will propose to the European Union to eliminate the seasonal time change for next year.
But the question that concerns us here is: does it really help to save energy?
Boating soon. According to an analysis prepared by Papernestthe time change barely moves the electricity consumption needle. The report, based on data from Red Eléctrica de España (REE) between 2020 and 2024, reveals that the time adjustment today has an almost imperceptible effect on light demand. “The time change no longer has a clear effect on electricity consumption. In several years an increase has even been observed during the afternoons,” states the report to which we have had access.
More in depth. The analysis compares the week before and the week after each time change for five consecutive autumns. The results show very small variations – between -6% and +2% – and without any pattern. In three of those five years, consumption in the period of greatest domestic activity (from 6:00 p.m. to 11:00 p.m.) even increased between 0.3% and 2.4%.
Only in 2022 was a significant drop in consumption recorded, close to 6%, although analysts attribute this to the exceptional energy context of that autumn: record electricity priceslower general demand and a more moderate use of heating. A specific decrease that, according to the report, is not directly related to the time change.
Source: Papernest (2025), with data from Red Eléctrica de España (REE).
In summary, Spanish homes consume practically the same electricity before and after the change. Neither natural light nor temperatures seem to have an appreciable influence. “This reflects that the impact of the time change on the electricity consumption of current homes is practically insignificant,” concludes Papernest.
New habits dilute the supposed savings. If decades ago the time change served to make better use of daylight and reduce spending, today the structure of electricity consumption has completely changed. The report points to several factors: teleworking, electric heatingconnected devices and continued use of household appliances that previously only worked in certain strips. In other words, consumption is no longer concentrated only in daylight hours. Electrical activity has been “delocalized” within the day, and the idea that turning the clock back or forward an hour can make a notable difference is no longer true.
Furthermore, the document itself highlights that the small variations between weeks cannot be attributed to changes in temperature or solar radiation: there is no consistent correlation between meteorological conditions and demand oscillations.
And in the pocket? Neither. Papernest calculates that the average savings per household barely reaches 1.4 euros per year, even in the most optimistic scenario. The calculation is based on the average annual consumption per home in Spain (3,487 kWh, according to Iberdrola), an average reduction of 1.4% after the time change and an average price of €0.132 per kWh. “Even in this optimistic scenario, the economic effect of the time change is practically insignificant compared to the annual electricity bill,” the report summarizes.
Translated into an understandable figure, the time adjustment saves about €0.12 per week, or the equivalent of one hour of an LED bulb on. It is a symbolic gesture rather than a measure of efficiency. With savings out of the equation, the debate has moved to another area: that of the body and mind. The energy argument has become obsolete. So what reasons remain to maintain or eliminate the time change?
The focus on health and well-being. The consensus between specialists from the Spanish Sleep Society (SES) and other scientific institutions it’s clear: winter time – the one now adopted in October – is the most appropriate from a biological point of view.
International studies support this idea: maintaining winter time promotes rest, reduces fatigue and improves morning safety. On the contrary, permanent daylight saving time can generate constant “social jet lag”, especially in the westernmost areas of the country, where sunrises would be delayed until after half past nine in December.
The clock no longer changes anything. Five years of data and the same result: changing the time does not save energy, money, or effort. The human being is an animal of habit, which is why it has survived the change of time due to the inertia of the symbolic gesture. Currently, electricity consumption depends more on our routines, climate and technology than on the sun coming through the window.
Perhaps, as my colleague titled: “The country that never tires of hurting itself: the truth about the time change is that it is a controversy in which we can only lose.” This weekend we will turn the clocks backbut the time that really counts—that of consumption and rest—no longer moves. And it may literally be time to stop moving it.
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