Bangladesh has a tropical monsoon-type climate, with a hot and rainy summer and a dry winter.January is the coolest month with temperatures averaging near 26 deg C (78 d F) and April the warmest with temperatures from 33 to 36 deg C (91 to 96 deg F).
In the sixteenth century Christianity brought to the historic region of Bengal (now divided between Bangladesh and India) by Portuguese traders and missionaries. Aside from Bengali Christians, a significant number of the population in Bangladesh are Christians.
Pahela Baishakh first day of the Bangla year. Pahela Baishakh is celebrated in a festive manner in both Bangladesh and West Bengal. In Bangladesh Pahela Baishakh is a national holiday. Pahela Baisakh falls on April 14 or 15.