Nigerian Birthday Traditions - In Nigeria the 1st, 5th, 10th and 15th birthdays are considered extremely special events. On these birthdays they have huge parties which have up to 100 guests or more. On their birthdays they have a feast consisting of an entire roasted cow or goat. They also serve a dish called "jollof rice" which is rice with tomatoes, red peppers, and onions plus cassava which is similar to sweet potato.