Daylight saving time

Daylight Saving Time (DST) was introduced in Bangladesh a few months back. Accordingly, the clock was advanced by one hour. But it is now widely accepted that whatever benefits, if at all, that might have been derived out of this experiment, could also be obtained by advancing the working hours by an hour without disturbing the clock!
In fact, if working hours in government and semi-government organisations are advanced by an hour without disturbing the clock, there may be some additional benefits in terms of easing of traffic congestion in Dhaka city. This is likely to happen because of difference in commence-work and pack-up times of various private and non-government organisations.
Bangladesh is located roughly between 21.5N and 26.5N degrees latitude. Countries located at these lower latitudes usually cannot take the benefit of DST. At these latitudes there is not much difference between length of winter and summer daylight hours. For instance, length of summer daylight hour in Bangladesh would be about 14 hours. Whereas the countries located in higher latitudes have much longer summer daylight hours. Summer daylight hours increase with increase of latitude until it becomes 24 hour daylight (midnight sun). Therefore, use of DST is only justified in countries located in higher latitudes, usually above 30N degree latitude.
Our village people mostly keep track of time by looking at the sun position. So, DST has not affected them much. But it has definitely affected others. Their biological clock is going haywire. At 12:00 noon one would like to see the sun at the zenith i.e. overhead. But in reality, at 12 DST the sun is overhead at Kunming, China! And when the sun is overhead at Dhaka it is 1:00pm DST!
Introduction of DST has been an interesting experiment. But perhaps it is high time that we should revert back to Bangladesh Standard Time i.e. GMT+6 hours.