Pahela Baishakh or Bengali New Year
The festival is celebrated with processions, fairs and family time. The traditional greeting for Bengali New Year is শুভ নববর্ষ "Shubho Nabobarsho" which is literally "Happy New Year". It's a public holiday. The most likely thing is Bangla arts are great. I personally like that too much. In 2016, the UNESCO declared this festivity organized by the Dhaka University as a cultural heritage of humanity.
For every Bengali people it's really a important day and it's really a festival day for all. Happy new year to every Bengali's.