Kalenjin concept of week has 6 days

1.   Ayiin(oyiin) - day before yesterday
2.   Amut (omut) - Yesterday
3.   Raa or Raat, Kora, Rawuut, -Today
4.   Mutay (tomorrow)
5.   Tuun Ayiin (oyiin) - day after tommorrow
6.   Tuun,Tuun, Ayiin - day after tomorrow day.

We don't have the 7th day as the way the language functions doesn't allow. 
We can not for example say tuun three times. 
Its the same with counting. After 50, Konom, the counting doubles to 100,bokol.