It operates six hours ahead of Coordinated Universal Time and is observed uniformly across the country as a national standard.

In 2009, Bangladesh briefly observed daylight saving time (DST) as a measure to address an ongoing electricity crisis.

This meridian passes through the Harukandi Union, located in the Harirampur Upazila of the Manikganj District, within the Dhaka Division.

[1] During the 1940s, in the midst of World War II, British India underwent a series of time zone changes.

On 15 September 1951, Dacca Time (DACT) was introduced in East Bengal, which was UTC+06:00 achieved by subtracting 30 minutes from UTC+06:30.

[12][13] The country reverted to its original time offset of UTC+06:00 at midnight on 31 December 2009, several months later than initially planned and during the winter season.

They cited “public interest” as the primary reason for this decision and chose to maintain the previous time offset of UTC+06:00.