Mar Bisho Feast is to commemorate Mar Bisho.

According to the Holy Apostolic Catholic Assyrian Church of the East, the commemoration takes place every year in early September. The official commemoration date is September 14th of every year.

Mar Bisho Feast is a 501(c)(3) nonprofit organization.

It was established in the 1980s for the sole purpose of managing, organizing and holding the Feast every year.