Why the time difference between the US and Europe is one hour shorter this week
The article explains why the time difference between the US adn Europe is one hour shorter for a week every October. This happens because Europe and the US switch from daylight saving time to standard time on different dates. Europe ends daylight saving time on the last Sunday of October, while the US and Canada make the change on the first Sunday of november. During this gap week, the usual time difference between cities like London and New York is reduced by one hour, which can cause confusion for international calls and meetings.
Daylight saving time was originally introduced during World War I to conserve energy and has been standardized in various ways since than. Europe coordinates its clock changes across member countries, but the US follows its own schedule established by law.While there have been proposals in both regions to eliminate the seasonal time changes, no permanent changes have been made yet. The one-hour shift during this particular week highlights the ongoing complexity of coordinating time standards across different countries.
Why the time difference between the US and Europe will be one hour shorter this week
LONDON (AP) — For a week every October, people organizing international catch-ups and meetings on both sides of the Atlantic may be briefly confused: Did I just miss that conference call? Why is my grandmother calling me so early?
Most people quickly remember: It’s that strange time each fall when Europe and the United States are out of sync as they switch from daylight saving time to standard time.
Most countries do not observe daylight saving time. And for those that do — mostly in Europe and North America — the date of the clock change varies, partly because of how time-related laws were developed in difference places.
In countries that observe the practice, clocks are set forward one hour from standard time in March to make the most of increased summer daylight hours in the northern hemisphere.
Clocks “fall back” again in the autumn to standard time.
In the U.K. and Europe, this takes place at 2 a.m. on the last Sunday in October.
But in the U.S. and Canada, clocks go back one hour at 2 a.m on the first Sunday in November.
That in-between week means that the time difference between the two sides of the Atlantic — for example between London and New York — is one hour shorter than usual, potentially causing chaos for coordinating Zoom calls or other meetings.
The idea of daylight saving time had been floated for several hundred years, but didn’t become a standardized common practice written into law in many countries until the early 20th century.
Europe first adopted it during World War I as a wartime measure to conserve energy. Germany and Austria began moving their clocks by an hour in the summer of 1916. The U.K. and other countries involved in the war followed soon after, as did the United States and Canada.
Efforts were made over the years to coordinate time settings in Europe, and from 2002 all European Union member states adjusted their clocks twice yearly on the same days in March and October.
However, there has been no success in coordinating the time change more widely.
In the U.S., a 1966 law mandated a uniform daylight saving time nationwide, though the dates marking the twice yearly transitions have changed over the years. In 2022 the Senate unanimously approved a measure that would make daylight saving time permanent across the United States, but it did not advance.
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The current dates were established by Congress in 2005.
Many do not agree on the benefits of the seasonal time changes, and lawmakers in the U.S. and Europe have previously proposed getting rid of the time change altogether. So far no changes have been finalized.
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