🌸 Spring Forward
2:00 AM → 3:00 AM · lose an hour
🍂 Fall Back
3:00 AM → 2:00 AM · gain an hour
Slovakia keeps CET in winter and shifts one hour forward for the summer.
Countdown to the next change
Spring transition
Lose an hour of sleep, gain an hour of evening daylight
Autumn transition
Gain an hour of sleep as standard time returns
Longer evenings
Sunset falls an hour later through the summer months
Earlier sunrises
Winter mornings get light sooner once the clocks go back
Does DST Actually Save Energy?
This was the original justification, and it is the claim that has held up worst. A US Department of Energy report to Congress in 2008 measured the four weeks added to DST in 2007 and found a saving of about 0.5% of daily national electricity use — real, but small.
Other work has found no saving at all. A well-known study of Indiana, which adopted DST statewide in 2006, found residential electricity use actually rose by 1–4%: households used less lighting but more air conditioning on hot summer evenings. Any lighting savings are also partly offset by extra petrol use as people travel more in the lighter evenings.
Agricultural Considerations
The story that DST was introduced for farmers has it exactly backwards. Farmers in Slovakia and elsewhere were among its most persistent opponents, and the American farm lobby successfully campaigned to have national DST repealed after the First World War.
The reason is straightforward: farm work follows the sun, not the clock. Moving the clock forward just means doing the same work an hour earlier by the clock, while deliveries, markets and hired labour all shift with it. Dairy farmers make the point most often, since cows keep to their own schedule and take several days to adjust to a changed milking time.
Did you know?
- Russia experimented with permanent summer time from 2011 to 2014 before settling on permanent standard time.
- The Uniform Time Act of 1966 ended a chaotic period in which US cities set their own clock-change dates, and established a uniform national schedule.
- The energy case for DST is weak by modern standards. A US Department of Energy study in 2008 found savings of about 0.5% of daily electricity use, and other studies have found no saving at all.
Frequently asked questions
When do the clocks change in Slovakia in 2025?
Clocks go forward on Sunday, March 30, 2025 and back on Sunday, October 26, 2025.
Which way do the clocks go?
"Spring forward, fall back" is the usual mnemonic: forward one hour in spring, back one hour in autumn.
Do I have to change anything myself?
Phones, computers and anything that syncs over the internet update on their own. Car clocks, ovens, microwaves and older wall clocks generally do not.
Is Daylight Saving Time being scrapped?
It has been proposed in many places and adopted in few. The European Parliament voted in 2019 to end mandatory clock changes and the change has stalled; in the United States the Sunshine Protection Act has repeatedly passed the Senate without becoming law. Most of the world that changes its clocks is still changing them.