What is Daylight Saving

Learn about the history, benefits, and disadvantages of daylight saving time. Explore examples, case studies, and statistics on this practice.


Daylight saving time is a practice where clocks are set forward by one hour during the warmer months of the year to make better use of natural daylight. This change typically occurs in the spring and ends in the fall, allowing people to enjoy longer evenings and more sunlight during the day.


The concept of daylight saving time was first proposed by Benjamin Franklin in 1784 to save on candle usage. It was later implemented during World War I to conserve energy and has since been adopted by many countries around the world.


  • Energy Savings: By extending daylight hours, less artificial lighting is needed, leading to reduced electricity consumption.

  • Safety: More daylight in the evening can lower the risk of accidents and crime.

  • Health: Exposure to natural light has been linked to improved mental health and well-being.


  • Disruption: Changing the clocks can disrupt sleep patterns and cause confusion.

  • Productivity: Some studies suggest a decrease in productivity during the transition period.


One example of the impact of daylight saving time is the state of Arizona in the United States. Arizona does not observe daylight saving time except for the Navajo Nation within the state. This has led to some confusion for residents and businesses near the Navajo Nation border.

Case Studies

A study conducted by the University of California found that the implementation of daylight saving time resulted in a 1% decrease in energy consumption in the state. This equated to savings of over $700 million annually.


According to a survey by the National Sleep Foundation, over 70% of Americans feel tired after the switch to daylight saving time in the spring. This can have a negative impact on productivity and overall well-being.

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