Liputan6.com, Jakarta Daylight Saving Time (DST), or daylight saving time, will return to global attention in November 2025.
This practice of moving clocks forward one hour from standard time aims to take advantage of longer daylight hours in the afternoon, thus saving energy and providing more daylight hours at the end of the day.
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This time change will affect millions of people around the world, especially in the United States and Canada.
In November 2025, the primary focus of the DST change will be the end of the daylight saving time period in most of the Northern Hemisphere.
This means clocks will be moved back one hour, returning to standard time.
Meanwhile, some countries in the Southern Hemisphere will be in the middle of their DST periods.
What is Daylight Saving Time (DST)?
Daylight Saving Time (DST) is the practice of adjusting the time by moving clocks forward one hour during the warmer months to optimize the use of daylight, resulting in later evening darkness.
When DST is in effect, the sun rises and sets one hour later according to clocks.
This creates the illusion of "longer daylight" in the afternoon, which begins in the spring and ends in the fall.
At the end of the DST period, clocks are moved back one hour to standard time.
This "fallback" process returns the clocks to their pre-DST state.
End of DST in the United States and Canada
Most areas in the United States and Canada that observe Daylight Saving Time will end it on Sunday, November 2, 2025.
The time change will occur at 2:00 a.m. local time.
At that time, clocks will move back one hour, from 2:00 a.m. to 1:00 a.m.
This phenomenon, known as “fall back,” effectively adds an extra hour to the day for many people.
Every U.S. state observes daylight saving time except for Hawaii and Arizona, according to the National Conference of State Legislatures (NCSL).
"Because federal law does not currently allow full-time DST, Congress would have to act before states could adopt changes," according to the NCSL.
In Canada, most provinces and territories will also end DST, with exceptions such as most of Saskatchewan and some areas of British Columbia.
DST Conditions in the Southern Hemisphere
Unlike the Northern Hemisphere, countries in the Southern Hemisphere have the opposite Daylight Saving Time schedule.
Most areas in the Southern Hemisphere that observe DST will be in the middle of their daylight saving time period, not the beginning or end of it.
In Australia, several states, such as New South Wales, Victoria, and Tasmania, begin DST on the first Sunday in October. Therefore, by November 2025, these areas will be fully in the DST period.
The same applies to New Zealand, which begins DST on the last Sunday in September and will continue to observe it throughout November 2025.
Meanwhile, Brazil has been abolishing Daylight Saving Time nationwide since 2019, so no time change will occur there in November 2025.
Chile, on the other hand, typically begins DST in September and ends it in April, meaning they will also be in a DST period throughout November 2025.