Bangladesh visas are valid for six months from the date of issue and are good for stays of one or three months. Avoid April when humidity and heat gang up to make conditions intolerable.
Hindu festivals follow a different calendar but they generally fall at much the same date each year.
The Holi Festival or Festival of Colours, commonly known as the spring festival, is celebrated in the first week of March. Durga Puja is celebrated during October, and statues of the goddess astride a lion, with her ten hands holding ten different weapons, are placed in every Hindu temple. We encourage you to verify any critical information with the relevant authorities before you travel. This includes information on visa requirements, health and safety, customs, and transportation.