At a time in the distant past.
back in the day
In the distant past; especially, at a time fondly remembered (the good…
set one's watch back
To ponder or experience a past time.
cast one's mind back
To try to remember a particular time or event; to think about somethin…
go back in time
To talk about history or the past.
behind its time
Showing characteristics of the past; present in one's work after later…
work back
to work overtime; to make up time off by working overtime; to work bey…