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Bengali calendar


The Bengali Calendar or Bangla Calendar (বঙ্গাব্দ Bônggabdô or Banggabda) is a solar calendar used in the region of Bengal. A revised version of the calendar is the national and official calendar in Bangladesh and an earlier version of the calendar is followed in the Indian states of West Bengal, Tripura and Assam. The New Year in the Bengali calendar is known as Pôhela Bôishakh.

The Bengali Era (BS) or Anno Bengal (AB, Latin for: in the year of Bengal), the Bengali year (বাংলা সন Bangla Sôn, বাংলা সাল Bangla sal) is 594 less than the AD or CE year in the Gregorian calendar if it is before Pôhela Bôishakh, or 593 less if after Pôhela Bôishakh.

The revised version of the Bengali calendar was officially adopted in Bangladesh in 1987. However, it is not followed in India where the unrevised (non-revised) traditional version continues to be followed due to occurrence of Hindu festivals based on a particular sidereal solar day.

The Bengali calendar is a solar calendar.

The origin of Bônggabdô or Bengali Year (Bangla Year) is debated, with primarily two hypotheses. The development of the Bengali calendar is often attributed to King of Gour, Shashanka as the starting date (12 or 14 April 594 CE) falls squarely within his reign. The solar calendar is based on the Surya Siddhanta, a Sanskrit astronomical text.

Another theory is that the calendar was developed by Alauddin Husain Shah (reign 1494–1519), a Hussain Shahi sultan of Bengal by combining the lunar Islamic calendar (Hijri) with the solar calendar, prevalent in Bengal.


Month name
(Bengali)
Romanization Days
(Traditional non-revised
sidereal version
- India)
Days
(New revised
tropical version
- Bangladesh)
Traditional Season
in Bengal
Corresponding month
in the Gregorian calendar
Month name origin
- name of the stars
(Bengali)
Romanization
বৈশাখ Bôishakh 30 / 31 31 গ্রীষ্ম (Grishshô)
Summer
April–May বিশাখা Bishakha
জ্যৈষ্ঠ Jyôishţhô 31 / 32 31 May–June জ্যেষ্ঠা Jyeshţha
আষাঢ় Ashaŗh 31 / 32 31 বর্ষা (Bôrsha)
Wet season/Monsoon
June–July উত্তরাষাঢ়া Uttôrashaŗha
শ্রাবণ Shrabôn 31 / 32 31 July–August শ্রবণা Shrôbôna
ভাদ্র Bhadrô 31 / 32 31 শরৎ (Shôrôt)
Autumn
August–September পূর্বভাদ্রপদ Purbôbhadrôpôd
আশ্বিন Ashshin 31 / 30 30 September–October অশ্বিনী Oshshini
কার্তিক Kartik 29 / 30 30 হেমন্ত (Hemonto)
Dry season
October–November কৃত্তিকা Krittika
অগ্রহায়ণ Ôgrôhayôn 29 / 30 30 November–December মৃগশিরা (a.k.a. অগ্রহায়ণী) Mrigoshira(a.k.a. Ogrohayoni)
পৌষ Poush 29 / 30 30 শীত (Shīt)
Winter
December–January পুষ্যা Pushya
মাঘ Magh 29 / 30 30 January–February মঘা Môgha
ফাল্গুন Falgun 29 / 30 30 / 31 বসন্ত (Bôsôntô)
Spring
February–March উত্তরফাল্গুনী Uttorfalguni
চৈত্র Chôitrô 30 / 31 30 March–April চিত্রা Chitra
Day name (Bengali) Romanization Divine figure/celestial body Day name (English)
রবিবার Rôbibar Robi/Sun Sunday
সোমবার Sombar Som/Moon Monday
মঙ্গলবার Mônggôlbar Mongol/Mars Tuesday
বুধবার Budhbar Budh/Mercury Wednesday
বৃহস্পতিবার Brihôspôtibar Brihospoti/Jupiter Thursday
শুক্রবার Shukrôbar Shukro/Venus Friday
শনিবার Shônibar Shoni/Saturn Saturday

  • The first five months of the year from Bôishakh to Bhadrô will consist of 31 days each.
  • The remaining seven months of the year from Ashbin to Chôitrô will consist of 30 days each.
  • In every leap year of the Gregorian calendar, an additional day will be added in the month of Falgun (which is just 14 days after 29 February).
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Wikipedia

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