Shib Narayan Das was a Bangali student activist, at that time , Secretary of Comilla District branch of the then Chatra League (Students League).
He designed a part of the first national flag of Bangladesh[1] as desired by the then NUCLEUS (Shadhin Bangla Biplobi Parishad). By a match stick and yellow colored paint he marked the map of Bangladesh over the red circle of the proposed flag in the Room Num 118 of the then Iqbal Hall of Dhaka University (DU) at a deep night of 6 June up to the dawn of 7 June 1970. ASM Abdur Rab, Shahjahan Siraj, Kazi Aref Ahmed, Manirul Islam (Marshal Moni), Swapan Kumar Choudhury, Quamrul Alam Khan (Khasru) and some others were also involved in it and present at that time .
On behalf of the NUCLEUS the same flag was unfurled by A. S. M. Abdur Rab along with AFM Mahbubul Haq, Das and other student league leaders from the roof top of the western porch of the Arts Faculty of DU, on March 2, 1971, shortly before the outbreak of the Bangladesh Liberation War.
After the independence, the map of Bangladesh was removed from the flag.