An energy crisis in the USA prompted President Nixon to initiate daylight saving time four months early.

Year-round daylight saving time (DST), signed into law by President Richard Nixon in January 1974, sought to maximize evening sunlight and, in doing so, help mitigate an ongoing national gas crisis. But while the experiment initially proved popular, with 79 percent of Americans expressing support for the change in December 1973, approval quickly plummeted, dropping to 42 percent by February 1974, reported the New York Times’ Anthony Ripley in October of that year.