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The Bangladesh Bangla calendar
Bangladesh uses a revised Bangla calendar (latest revision 2019) so that national days always fall on the same English date. Pohela Boishakh — Bangla New Year — is always 14 April.
Month lengths
- Boishakh to Ashwin (first six months): 31 days each
- Kartik, Agrahayan, Poush, Magh and Chaitra: 30 days
- Falgun: 29 days, or 30 in a leap year
Bangla year
From 14 April, the Bangla year = English year − 593. Before 14 April it is English year − 594. For example, 14 April 2026 starts 1433 বঙ্গাব্দ.
Why businesses still use it
Many traders open a new ledger — Halkhata — on Pohela Boishakh, and rural markets, rent agreements and land records often use Bangla dates.