Sebenzisa izinkinobho eziphezulu ukuze ukhethe ukubonisa kuphela ubuso bewashi eliyindilinga, iwashi ledijithali kuphela, noma kokubili. Imodi yezinombolo iqukethe unyaka wendawo, inyanga, usuku, amahora, imizuzu, imizuzwana namadijithi amathathu ama-millisecond.
Isikhathi sithathwa ewashini lesistimu yedivayisi yamanje. Isibonisi se-millisecond sibonisa isikhathi sokuvuselela isiphequluli futhi akuyona isevisi yesikhathi esilinganiselwe noma isevisi yesikhathi.
Khetha imodi yokudayela, inombolo noma inhlanganisela. Ikhasi lisebenzisa isikhathi sasendaweni futhi lisebenza ngaphakathi kwesiphequluli, ngaphandle kwesikhathi noma ulwazi lwedivayisi olulayishiwe.