Time change: why ?

Daylight Saving Time: A brilliant invention or a historical puzzle?

Since 1998, the European Union has been promoting harmony: every last Sunday of March and October, millions of Europeans synchronize their watches. In France, this ritual has been going on since 1974. But beyond the simple hour gained or lost of sleep, do you know where this temporal exercise really comes from?

Benjamin Franklin's spark: "Let's save candles!"

The idea is not new. In 1784, Benjamin Franklin, then United States ambassador to Paris, was surprised to see the sun shining long before Parisians got out of bed.

His observation was simple: we waste hours of natural light in the morning to burn tons of candles in the evening. With humor, he suggested that the French align their schedules with the sun's. While the idea was appealing, it took more than a century to catch on. It wasn't until 1916, in the midst of the First World War, that Germany, followed by the United Kingdom and France, adopted daylight saving time to conserve the coal needed for the war effort. However, the measure was abandoned at the end of the conflict.

Time zone chaos: When the SNCF dictated the time

The story takes a darker turn in 1940. Under the Occupation, Nazi Germany imposed its time (GMT+2) on the occupied zone. The problem: the free zone remained on the French time of the time (GMT+1).

Did you know? This time difference created a logistical nightmare for the SNCF (French National Railway Company). Trains crossing the demarcation line constantly had to juggle two time zones. In 1941, to stop these chronic delays, the Vichy government aligned the southern zone with German time. France never fully reverted to the previous system.

"We may not have oil, but we have ideas!"

Daylight Saving Time, as we know it today, was reintroduced in 1976 during Valéry Giscard d'Estaing's presidency. The 1973 oil crisis had left its mark: energy was expensive. The objective was clear: to align working hours with daylight hours in order to reduce electricity bills for lighting.

A world divided on the issue

Today, while the EU and North America cling to this system, the rest of the world is far from convinced:

• Africa and Asia are largely unaware of this practice.
  
• Russia threw in the towel in 2011, prioritizing the stability of its citizens' biological rhythms.
  
• Within the EU, the debate remains open: The end of daylight saving time is regularly discussed., but countries are struggling to agree on the final time to adopt (summer or winter?).
  

So, is it just a habit or an outdated energy practice? The debate continues, but in the meantime, don't forget to adjust your watches !