The Complete History of Daylight Saving Time: From Benjamin Franklin to Modern Debates

Twice a year, approximately 1.6 billion people in over 70 countries adjust their clocks by one hour. It seems like a minor inconvenience | until you miss a flight, join a meeting an hour late, or lose an hour of sleep. But where did this global practice come from? The history of Daylight Saving Time is a story of satire, war, energy crises, and a surprising amount of political controversy spanning more than two centuries.

The Benjamin Franklin Myth

Many people believe Benjamin Franklin invented Daylight Saving Time. This is not exactly true. In 1784, while living in Paris as an American diplomat, the 78-year-old Franklin wrote a satirical letter to the Journal of Paris titled An Economical Project. He joked that Parisians could save millions of francs on candles if they simply woke up earlier to use the morning sunlight. He proposed ringing church bells and firing cannons at sunrise to wake everyone up. It was satire, not a serious proposal, but the core insight (aligning waking hours with daylight to save energy) would prove remarkably durable.

The Real Inventor: George Hudson

The first person to seriously propose modern Daylight Saving Time was George Vernon Hudson, a New Zealand entomologist and postal worker. In 1895, Hudson presented a paper to the Wellington Philosophical Society proposing a two-hour daylight saving shift. As a shift worker who collected insects in his spare time, Hudson valued daylight hours after his workday ended. His proposal was ridiculed at first. One critic suggested Hudson simply ask his boss to let him leave work earlier. But Hudson persisted, and his idea slowly gained traction.

William Willett: The British Champion

The man most responsible for making DST a reality was William Willett, a British builder from Chislehurst, Kent. The story goes that Willett was riding his horse through Petts Wood one summer morning in 1905 when he noticed most houses still had their curtains drawn, even though the sun had been up for hours. He calculated that advancing clocks by 80 minutes in four 20-minute steps during April and reversing them in September would save 2.5 million pounds per year in lighting costs.

In 1907, Willett self-published a pamphlet titled The Waste of Daylight and began an intense lobbying campaign. He gained the support of prominent politicians, including a young Winston Churchill and David Lloyd George. Parliament debated a Daylight Saving Bill in 1908 and 1909, but it failed both times. Willett died of influenza in 1915 at age 58, never seeing his idea implemented. His great-great-grandson is Chris Martin, the lead singer of Coldplay | who wrote the song Clocks, perhaps a tribute to his ancestor's obsession with time.

World War I: The Catalyst

What Willett could not achieve in peacetime, war accomplished almost overnight. On April 30, 1916, Germany and its ally Austria-Hungary became the first countries to implement Sommerzeit (summer time), advancing clocks by one hour to conserve coal for the war effort. The logic was simple: if people had an extra hour of daylight in the evening, they would use less artificial lighting and burn less coal, which could instead power the war machine. Britain followed on May 21, 1916. The United States adopted DST in 1918 (and then repealed it in 1919 due to opposition from farmers, who hated losing morning daylight).

World War II: The Most Extreme DST

During World War II, Britain took DST to extremes. From 1941 to 1945, the UK operated on British Double Summer Time (BDST): UTC+2 in summer and UTC+1 in winter. This meant that on the longest summer days, the sun set after 10:00 PM in London. The goal was to maximize productivity in factories and reduce the risk from German bombing raids, which typically began after dark. The United States also instituted year-round DST from February 1942 to September 1945, calling it War Time.

The Modern DST Patchwork

After the wars, DST became a permanent but chaotic fixture of modern life. The United States standardized DST dates in 1966 with the Uniform Time Act, though states could opt out (as Hawaii and most of Arizona did). The energy crisis of the 1970s led to year-round DST in the US for two winters (1974-1975), but it was so unpopular (children going to school in pitch darkness) that Congress repealed it after just one winter.

The Energy Policy Act of 2005 extended US DST by four weeks (starting three weeks earlier in March and ending one week later in November), effective 2007. Meanwhile, the European Union standardized DST dates across all member states in 2002. Chile, which had abolished DST in 2015, reinstated it in 2016. And many countries near the equator never adopted it at all because day length varies little throughout the year.

The Growing Abolition Movement

In the 21st century, the tide has begun to turn against DST. Research consistently shows that the spring-forward transition increases heart attacks by 24%, workplace injuries by 6%, and traffic accidents by 6% in the days following the change. The European Parliament voted in 2019 to allow member states to choose permanent summer or winter time starting in 2021, though implementation has stalled. Mexico abolished DST for most of the country in 2022. Brazil abolished it in 2019. Russia stopped in 2014. The question is no longer whether DST saves energy (the evidence says it does not, or at least negligibly so) but whether the health, safety, and convenience costs outweigh any perceived benefits. The answer increasingly appears to be yes.