old as the hills

aboriginal age-old ancient antediluvian antiquated antique archaic bygone crumbling dated decayed done démodé early erstwhile former hackneyed hoary immemorial late moth-eaten of old of yore old as Methuselah old-fashioned old-time oldfangled once onetime original out-of-date outmoded passé past primeval primitive primordial pristine quondam relic remote rusty sometime stale superannuated time-worn timeworn traditional unfashionable unoriginal venerable worn-out