Bangladesh Standard Time
The official time signal is given by the Bangladesh Standard Time is calculated on the basis of the 90 . 00° E longitude , which passes over the Harukandi Union of Harirampur Upazila of the Manikganj District in Dhaka Division , Bangladesh . 
<triplet> Harirampur Upazila <subj> Manikganj District <obj> located in the administrative territorial entity <triplet> Manikganj District <subj> Dhaka Division <obj> located in the administrative territorial entity <triplet> Dhaka Division <subj> Manikganj District <obj> contains administrative territorial entity