Family of the prominent writer and his fans are observing the day with various programmes including offering special prayers at the writer's graveyard at Nuhash Palli and holding milad and doa mahfil.
Different television channels will air various programmes highlighting the life and works of the wordsmith.
Humayun Ahmed was born in Netrakona’s Mohanganj to Foyzur Rahman Ahmed and Ayesha Foyez on November 13, 1948.
The writer died of cancer at a hospital in New York on July 19, 2012.
His breakthrough was his debut novel Nondito Noroke published in 1972.
He wrote over 200 fiction and non-fiction books, all of which were bestsellers in Bangladesh.
Humayun Ahmed won Ekushey Padak, Bangla Academy Award, Lekhak Shibir Award and Michael Madhusudan Padak for his outstanding contributions to the Bangla literature.
In the early 1990s, Ahmed emerged as a filmmaker. He went on to make a total of eight films - each based on his own novels. He received six Bangladesh National Film Awards in different categories for the films Daruchini Dwip, Aguner Poroshmoni and Ghetuputra Komola.
Ahmed is often credited with revitalising Bengali literature. His unique storytelling style captures the oral tradition and rhythm at the root of Bangla, bringing to life the stories and aspirations of traditional middle class and rural families.