18 Disemba bu ubochi nke 18th (nke iri na asatọ) na onwa ana kpo Disemba. Na Gregorian calender, 18 Disemba bu ubochi nke 352nd (353rd na afo nke ana-kpo leap year) na afo. Anyi nwere agugu ubochi 13 du mgbe afo na agwu.