According to the Bangla calendar it spreads over the months of Paus and Magh (mid-December to mid-February). But practically, November through February is the winter season in Bangladesh. Winter is the best and most enjoyable season of Bangladesh. Date juice is extracted during this time, to be used as juice or made into gud (molasses). This is the season for pitha or rice cakes such as bhapa pitha, chitai pitha, patisapta and puli pitha.
During this season, a centre of high pressure lies over the northwestern part of India (Himalayan zone). A stream of cold air flows eastward from this high pressure and enters Bangladesh through its northwest corner. During this season, winds inside Bangladesh generally have a northerly component