Wa Alaikum Assalam, thank you so much for your kind words. It usually lasts for one day, celebrated on April 14 according to the Gregorian calendar. You can enjoy colorful processions, traditional music, dance performances and various cultural events. You will find it being served in many restaurants and households during the celebration. If you are planning to enjoy Pahela Boishakh in Bangladesh, I recommend visiting Dhaka, where the festivities are most intense. Enjoy delicious culinary delights with panta hilsa.