History of Bangladesh’s Time Zone Evolution

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In the early days, Bangladesh’s Time Zone was used to tell the time. At the time, Bangladesh used time-balls at Fort Canning and Mount Faber to enable sailors to test their chronometers with falling balls at 1300 hours per day. During World War II, the Department of Public Works (PWD) cut off the masts because the masts created an “ideal” marker for artillery. After the war, the time-ball became redundant because most ships had wireless to give them time. The History of Bangladesh’s Time Zone Evolution is great.


Bangladesh was 1 hour ahead of GMT from 19 June 2009 to 31 March 2010, then clocks from 2009 were taken 1 hour ahead for daylight saving, however, instead of 1 hour, it was made 1 hour in 2009. During World War II, the Japanese time occupation, our watch was synced with Tokyo and so we were 1 hour 30 minutes ahead of the previous time zone. Once the occupation was over, it was returned 7 hours 30 minutes before GMT. Later in 1982, our watches were synchronized with Malaysia.

History of Bangladesh’s Time Zone Evolution

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At present, Bangladesh does not observe daylight saving time in the traditional sense due to its tropical location. In 1933, the 20-minute Off-Set Straight Settlement was introduced on an annual basis by the Legislature. The Daylight Saving Ordinance was introduced in 1990 but was later abandoned. This means 30 minutes offset or greenwich means seven and a half hours advance launch.


On June 19, 2009, the “Daylight Saving Time (DST)” system was introduced for the first time in Bangladesh. On that day, eleven o’clock at night was moved forward one hour to twelve o’clock at night 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 “day light 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. About one and a half hundred countries, including the world’s largest countries, have been using this method to save electricity at different times.

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The Daylight Saving Time (DST) method is a slight change in the time calculation method that is used for maximum use of daylight. The new time count is started by 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. Basically such a calculation method of time is adopted for the purpose of maximum use of daylight.


It is most commonly found in areas of the world where summer is short-lived, i.e. in temperate countries. The addition is usually made 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 setting late. As a result, the relatively short summer nights become shorter, and the relative durability of the day seems to increase.

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Although Bangladesh followed the first day light saving pattern in 2009, it started long ago. Benjamin Franklin of America was the first to give 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 time had been given ahead.


George Hudson, an entomologist and astronomer in New Zealand, took the issue 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 1908 and declared it an effective way to save energy.


Then in 1917 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.

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At present, this method is mainly used to save electricity. Suppose all school institutions, offices, courts or factories are opened at ten o’clock in the morning. Now in summer the length of day is longer and the length of night is shorter. So if the time is given an hour ahead in summer, people will wake up an hour earlier and go to work.


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 the 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.

FAQ For History of Bangladesh’s Time Zone

How is Bangladesh time zone written?

 Bangladesh Standard Time – BST Time Zone (Standard Time) Currently observing BST – Bangladesh Standard Time. Currently BST (UTC +6) has the same time zone offset but different time zone names. Bangladesh Standard Time (BST) 6 hours ahead of Unified Public Time (UTC)

Which country has the same time zone as Bangladesh?

Bangladesh standard time is consistent with UTC +6. There is no corresponding daylight saving time in Bangladesh Standard Time. Bangladesh standard time only applies to Bangladesh.

Why do we have time zones?

 The expansion of transportation and communication in the 19th century created the need for a unified time-keeping system, and time zones were introduced. Before the invention of the clock, humans used various instruments to observe the passing of the sun around noon.

How many upazilas in Bangladesh?

495 upazilas. There are 495 upazilas in Bangladesh (as of 26 July 2021). Upazilas are the second lowest level of regional administration in Bangladesh.

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