BlockChain Olympiad Bangladesh 2021 was held on (25th – 27th) February 2021 where Technohaven Company Ltd. played the leading role to organize the 3 days event successfully. We were the main organizer of BCOLBD 2021. Mr. Habibullah N Karim, Founder & CEO of Technohaven Company Ltd. was the Coordinator of this event & Ms. Tahmina Sharmin, Quality Assurance Specialist of Technohaven Company Ltd. was the secretary of BCOLBD 2021.