eons ago

back when in days of yore long ago of old olden days

already earlier heretofore once

erstwhile

a while back aforetime anciently at one time away back back back when before before now before this down memory lane erewhile in former times in the olden days in the past lately long ago of old of yore olden days once upon a time radically some time ago time was used to be water under the bridge

currently future presently subsequently