A long time ago
in the old days phrase
a long time ago, especially a time you remember as being good or happy
way back phrase
a long time ago in the past
long adverb
much earlier or later than a particular event or period
distant adjective
far away in time
remote adjective
far away in the past or future
far-off adjective
happening a long time before or after the present time
removed adjective
distant in time or space
far adjective, adverb
a long time in the past or the future, or a long time before or after a particular time
dim and distant phrase
used for saying that something happened a long time ago
in (the) olden days/times phrase
used for talking about what happened a long time ago