Coordinated Universal Time na bekee, (UTC), bu otu adi-iji amata ihe oge bu n'elu uwa nile. O bu taa ndi mmadu no n'uwa nwe ọtu ha nwere-ike ima oge ma mgbe ha gara ogbozo. Ndi International Atomic Time bu ndi n'eleekotawa machine nke n'emee oge uwa di mma.