Twice a year, roughly a quarter of the world’s population adjusts their clocks by one hour. The rest of the world does nothing. No announcement. No confusion about whether the microwave is now showing the right time. No week of waking up at the wrong moment.

The majority of countries on Earth do not observe daylight saving time. This is not inertia or underdevelopment. It is, in most cases, a deliberate decision based on geography, history, or explicit policy choice. The question of why some countries changed clocks, and why most never bothered, reveals how deeply political the organization of time actually is.

The equatorial reality

The most straightforward case is geography.

Daylight saving time is designed to shift the daylight hours later in the day during summer, giving people more usable evening light. The mechanism only works because summer days in temperate latitudes are significantly longer than winter days. At 50 degrees north latitude, the summer solstice day is nearly 16 hours long and the winter solstice day is barely 8 hours. Shifting the clock forward by one hour in summer meaningfully changes when that extra daylight occurs relative to working and leisure hours.

Near the equator, this variation essentially disappears. Singapore, which sits at approximately 1.3 degrees north, experiences roughly 12 hours of daylight every day of the year. Sunrise is around 7am. Sunset is around 7pm. There is no “extra summer daylight” to capture. Shifting the clock forward would simply mean people wake in darkness and gain nothing.

Countries in the equatorial band, from West Africa through Southeast Asia through equatorial South America, generally do not observe daylight saving for this reason. There is nothing for the policy to accomplish. The sun does not cooperate with the logic.

This covers a substantial portion of the world’s non-DST nations: most of sub-Saharan Africa, much of South and Southeast Asia, and the equatorial regions of Latin America.

Japan’s deliberate choice

Japan tried daylight saving once. It did not go well.

After World War II, the Allied occupation authorities imposed daylight saving time on Japan in 1948. The policy ran for four years, from 1948 through 1951, during which Japan observed a summer clock advance similar to American practice.

The Japanese public did not like it. Working culture at the time, and largely still, tied work hours to daylight rather than the clock. Extending daylight by fiat meant extending the expectation of work. Farmers and workers reported longer effective workdays without corresponding compensation. The dislike was not a matter of inconvenience so much as a sense that the policy served management more than workers.

When occupation ended and Japan regained policy control, it abolished daylight saving time in 1952 and has not reinstated it since. The question has been revisited several times, most recently when Japan considered adopting DST in advance of the 2020 Tokyo Olympics to moderate heat exposure for athletes competing in summer events. The proposal was debated seriously in 2018 and rejected. The opposition cited economic disruption, health effects from disrupted sleep, and the historical cultural resistance that dates to the occupation era.

Japan operates on a single timezone, Japan Standard Time at UTC+9, year-round. No clock changes. No seasonal adjustment.

China and political time

China observed daylight saving time from 1986 through 1991. It was abolished in 1992 and has not returned.

The complications were particular to China’s situation. The country spans five natural geographic time zones but operates on a single official time, China Standard Time at UTC+8. In western China, particularly Xinjiang province, UTC+8 is already significantly earlier than solar time. In winter, sunrise in Kashgar can be after 10am by the official clock. Adding an additional hour of offset through daylight saving would have pushed dawn to nearly 11am in parts of the country.

The abolition was administrative and has faced no serious challenge since. For the central government, maintaining a single national time already serves political unity purposes. Adding the complication of seasonal transitions would have amplified the existing tensions around Xinjiang’s informal local time practice without providing any benefit to the majority of the population in the more central and eastern provinces.

Russia’s experiment and reversal

Russia’s relationship with daylight saving time is more recent and more dramatic than most.

The Soviet Union observed daylight saving from 1981. Post-Soviet Russia continued the practice until 2011, when President Medvedev announced that Russia would remain on permanent summer time, eliminating the autumn rollback. The stated reasons were health-related: research cited in the announcement associated the twice-yearly time change with increased heart attacks, suicides, and productivity loss in the weeks following each transition.

The result was that Russia’s cities remained on a permanent time that was one hour ahead of their standard astronomical time. In winter, Moscow sunrise was pushed to after 10am on many days. The extended winter darkness in the mornings, without any compensating afternoon light, proved more disruptive than the original clock-change system.

In 2014, Russia reversed course, moving back to permanent winter time (the standard offset) and eliminating the summer advance rather than the winter one. Russia now operates on UTC+3 in Moscow year-round, without transitions.

Several Russian regions also adjusted their offset during this period, and the current Russian timezone map is considerably different from the Soviet-era configuration. The practical result is a country that has definitively abolished daylight saving but arrived at this outcome through a full cycle of change, overcorrection, and adjustment rather than simple continuity.

The rest of the list

Beyond these major cases, the countries not observing daylight saving time include most of the world by both count and population.

India: UTC+5:30, no DST, year-round. The country spans a wide east-west range but operates on a single timezone as a matter of national unity. The same equatorial logic applies: India’s latitude range includes enough tropical zones that the benefit would be uneven and the disruption significant.

Most of the Middle East: Some countries in the region historically observed daylight saving and have since abolished it. Turkey moved to permanent UTC+3 in 2016, abolishing the summer advance. Saudi Arabia has never observed daylight saving. The UAE, Qatar, Bahrain, Kuwait, and Oman do not observe it.

Most of Africa: Very few African countries observe daylight saving time. Morocco and Namibia are among the small exceptions. The continent’s size means most of its territory falls in subtropical to tropical zones where the benefit is limited, and the legacy of colonial time systems was absorbed and modified independently by each newly independent nation.

Most of Asia: With the exception of Israel and a few others, Asia broadly does not observe daylight saving time. This includes Indonesia, the Philippines, Thailand, Vietnam, Bangladesh, Pakistan, and most of the region’s large populations.

Most of South America’s equatorial nations: Brazil abolished daylight saving in 2019, having maintained it in some southern states for decades. The northern Brazilian states had never observed it. Ecuador, Colombia, Venezuela, and Peru do not observe it.

The countries that do observe daylight saving time are primarily in North America, Europe, and parts of the southern hemisphere at higher latitudes: parts of Australia, New Zealand, Chile, and a few others.

The growing case for abolition

The summertime transition page covers the mechanics of how clock changes work in the countries that still use them. But the trend line is clear: over the past decade, more countries have abolished daylight saving than have adopted it.

The European Union held a consultation in 2018 in which 4.6 million people participated, making it the largest public consultation in EU history to that point. 84% of respondents favored eliminating the biannual clock change. The European Parliament voted in 2019 to abolish it, with member states given the choice to remain on permanent summer time or permanent winter time. Implementation has stalled in negotiation over which standard to adopt, since neighboring countries diverging by an hour would create new coordination problems, but the direction of policy intent is established.

In the United States, the Sunshine Protection Act, which would make daylight saving time permanent year-round, has passed the Senate (in 2022) but has not become law. The debate in the US centers on whether permanent summer time (UTC-4 for Eastern, the current DST standard) or permanent winter time (UTC-5 for Eastern, the current standard time) would be preferable, with health researchers generally favoring standard time for its alignment with solar noon and sleep researchers citing evidence that permanent DST misaligns morning light with wake times in a way that compounds existing sleep deficits in modern populations.

The countries that never adopted daylight saving time, or abandoned it decades ago, face none of this negotiation. Their populations wake up to the same clock offset every day of the year. The sun moves through its seasonal rhythm, days lengthen and shorten, and the clock stays fixed.

Whether that represents enlightened policy or missed opportunity depends almost entirely on how far from the equator you live.

Sources

  • Roenneberg T, et al. “Entrainment of the Human Circadian Clock.” Current Biology, 2007. doi: 10.1016/j.cub.2007.10.014
  • Lahti TA, et al. “Daylight saving time transitions and hospital admissions due to myocardial infarction in Finland.” BMC Cardiovascular Disorders, 2008. doi: 10.1186/1471-2261-8-22
  • European Parliament resolution of 26 March 2019 on summer time arrangements (2018/2143(INL)).
  • European Commission. “Public Consultation on Summertime Arrangements.” July 2018. ec.europa.eu
  • Japan Cabinet Office. Report on Daylight Saving Time Consideration for Tokyo 2020 Olympics, 2018.
  • IANA Time Zone Database. Asia, Europe, and Antarctica zone history files. iana.org/time-zones
  • Harrison Y. “The impact of daylight saving time on sleep and related behaviours.” Sleep Medicine Reviews, 2013. doi: 10.1016/j.smrv.2012.10.001
  • Medvedev D. Address on permanent summer time. Russian presidential address, June 2011.