sell-by date
OK, boomer
big
prehistoric
standpat
fusty
nonprogressive
outdatedly
dated
unprogressive
olde tyme
parachronistic
yesterday
backdating
didine
cobwebbiness
moss-grown
old timey
presenile
old
ghost from one's past
antwacky
older adult
youngness
archaize
antiquated
obsoleteness
cobwebbed
superannuation
there again
swaybacked
aged
back then
senile
elderly
might
antediluvianism
age before beauty
you haven't lived
neolithic
whiskery
past
four score and seven years ago
gray
aad
one
ageistically
behind the times
olde worlde
came
senescent
dried out
of age
ain't what it used to was
passé
is that the time
outdated
be
late in the game
show one's age
God be with the days
ye olde
seriously
oldly
démodé
out-of-dateness
zeerust
whoosh
vetustity
senior moment
spavined
retronymously
one day
outmoded
trite
dad
archaistic
doter
granddad
historical
late antique
if you know what I mean
outworn
behind the curve
paleologism
old sod
chestnut
dinosaurish
it's about time
you must be new here
gone
what was someone smoking
archaicism
at that time
archaism
arcane
old days
retrocessional