
Back in the day
Nostalgic Undertone
Implies a fond or wistful memory of earlier times, often with a hint of longing.

Back in the day, summers seemed to last forever.
Not Literal
It doesn't specify an exact time. It's a general reference to the past.

Back in the day, high school felt like a different world.
Conversational Use
Most common in informal talks among friends, family, or peers.

Back in the day, we didn't have smartphones to keep us busy.
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