21 Novemba bu ubochi nke 21st (nke iri abụọ na out) na onwa ana kpo Novemba. Na Gregorian calender, 21 Novemba bu ubochi nke 325th (326th na afo nke ana-kpo leap year) na afo. Anyi nwere agugu ubochi 40 du mgbe afo na agwu.