Chapter one
Name & etymology
Earliest documented name
Chattogram
Bengali
"The etymology is disputed, with theories ranging from local topographic descriptions to ancient village roots."
A historic coastal region that has served as a primary link between the Bay of Bengal and the inland territories for centuries.
Pre-2018
Chittagong
Various
The standard English spelling used throughout the British Raj and the post-independence era.
2018-Present
Chattogram
Official Bengali transliteration
The government officially transitioned to this spelling to better reflect local phonetic pronunciations.
Chapter two
Timezone history
Current timezone
Asia/Dhaka
- Standard
- Bangladesh Standard Time
- Daylight
- No Daylight Saving Time
1952
East Pakistan Standard Time
During the era of East Pakistan, the region followed time standards synchronized with the broader subcontinent.
1971
Bangladesh Standard Time Adoption
Following national independence, the country formalized UTC+6 as the standard for all administrative and transit operations.