Sincerely cooking of rice every sunday is not a tradition its just that way because, there was a time when rice was very expensive and seemed like a ‘Rich Man’s Food’, so having it on a Sunday was regarded as a thing to do.
Most of us that grew up in Nigeria, grew up to get adapted to this tradition. Many of us grew up to witness this funny tradition and have upheld it ever since without questioning. I know there are some exceptions to this; as regards to some families and some parts of the country, but the fact remains that many cook rice on Sundays.
Personally , i can tell you how grewing up i anticipated Sunday’s not just for the services but for the rice that came afterwards.
Sunday is a special day of the week and majority of Christians, go to church on Sundays. So, after service, it is seen as needful to grace the day with a ceremonious food. Sundays carry special atmosphere which makes it stand out and the relaxed atmosphere of Sunday afternoons seems only to be satisfied with a plate of rice. The flexibility of easily packaging the rice to work or school the next day, which is Monday, is one reason many homes go for rice on Sundays