Bangladesh Standard Time (Bengali: বাংলাদেশ মান সময়) (BST) is the time zone of Bangladesh which is observed throughout the whole country, with a time offset of UTC+6:00. Bangladesh does not observe any Daylight saving time. Bangladesh Standard Time is calculated on the basis of 90.00° E longitude, which passes over the Harukandi Union of Harirampur Upazila of Manikganj District of Dhaka Division, Bangladesh.