On June 19, 2009, the “Daylight Saving Time (DST)” system was introduced in Bangladesh. On that day, eleven o’clock at night was brought forward by one hour, midnight, and the counting of time was started anew. The issue was completely new to the people of Bangladesh. That is why there has been a lot of discussion and criticism about what the “daylight saving time” method is and why or why it is being used.

However, this method is being followed not only by Bangladesh but also by different countries of the world. More than one and a half hundred countries, including the major countries of the world, have been saving electricity by following this method at different times. Now the question is how does this method help in saving energy, and how is it related to energy saving?

What is the “daylight saving time” method?

The Daylight Saving Time (Daylight Saving Time-DST) method is a slight variation of the time calculation method that is used for maximum use of daylight. The new time count is started one or two hours ahead of the local time count. For example, in the case of Bangladesh, eleven o’clock at night was made twelve o’clock. That is, the time was calculated one hour ahead. Such a calculation method of time is adopted for maximum use of daylight. It is most commonly found in areas of the world where summer is short-lived, that is, in temperate countries. This is usually done at the end of spring. It has some benefits. Since the thorns move forward one hour or two longer than the original geographical time, the sun appears to be getting late. As a result, the shorter summer nights become shorter, and the relative durability of the day seems to increase.

The early history of “Daylight Saving Time”

Although Bangladesh followed the first daylight saving pattern in 2009, it started long ago. Benjamin Franklin from America was the first to come up with the idea. In 184 he gave the idea. In a letter to the editor of The Journal of Paris, he jokingly said that the use of candles could have been reduced if the time had been given ahead. George Hudson, a New Zealand entomologist and astronomer, took the matter seriously and suggested that time calculations be advanced two hours each spring to make the most of daylight. However, the issue became even more important when the British architect William Willett reconsidered the issue in 1906 and declared it an effective way to save energy.

Then in 1918 the German Empire and Austria-Hungary first applied this method. Since then, the practice has been followed in more than 150 countries around the world. It was launched in 2009 in about 75 countries including Bangladesh.

The way “Day Light Saving Time” saves electricity

At present this method is mainly used for saving electricity. Suppose all school institutions, offices, courts, or factories are opened at ten o’clock in the morning. Now in summer, the length of the day is longer and the length of night is shorter. So if the time is given an hour ahead in summer then people will wake up an hour earlier and go to work every day. That means they will finish their work one hour earlier every day and will be able to go to sleep at night. And the extra electricity that was used in this one hour will no longer be used. Which means electricity will be saved.

As the sun rises faster in summer, the supply of sunlight is higher during most of the day. So as work time progresses, the use of electric lamps or lighting used in different workplaces decreases.

Last word

Although this method is very popular all over the world, it has been discussed at different times. Especially in the case of Bangladesh. The lack of proper rules for its application had a negative reaction among the people. Applying this method at the right time and in the right area will save some energy. But the unreasonable application will not bring much success without the suffering of the people.


Please enter your comment!
Please enter your name here