Good qusetion and one for policy makers of African countries to consider although I doubt its a consideration. To have your own arbitary start of the year means you have pride and confidence in your culture and knowledge of your forebears.

Tell me where in Africa do you see that mentality when it comes to the sciences or language. You think any church going/ mosque visiting African is going to go for that 'heathenism'. I dont know why you torture yourself.