halcyon days
good old days
dewy-eyed
nostalgically
nostalgize
nostophobia
nostalgism
roll back the years
reminisce
take back
yearn
nostalgiac
bygone
reminiscence
nostalgic
old times
pastness
reflective
anemoia
lang syne
send back
auld langsyne
old days
earlier on
langsyne
set one's watch back
ain't what it used to was
yestertide
yestertime
flash back
old time
forelay
memory
look back
souvenir
memento
retrospection
bypast
gone
nostalgist
back in the day
preterlapsed
prehodiernal
formerly
you can't go home again
prehesternal
flashback
recherche du temps perdu
whilom
past
blove
historical
retro-nostalgia
cast one's mind back
retrospect
nonrecently
retro-
just then
long ago
forespoke
one day
misremembrance
by now
reminiscenceful
foregave
remember like it was yesterday
retrograde
flashbulb moment
pluperfect
age-old
yesterday
awent
time immemorial
antique
time out of mind
days of yore
way back when
past simple
for old times' sake
old timey
precontemporary
long memory
querencia
antecedently
earlier
previously
foreheld
before
elder
memory image