[English] That's when/Back then/At the time 차이

That’s when… 그 순간이었어.

One of my employees confessed to stealing from the company.  That’s when I decided to fire him.

그 순간에 난 그를 해고하기로 결정했지.

I felt really bad after failing my English test. That’s when I decided it was time to study abroad!

The child started to scream at everyone in the restaurant.  That’s when I decided it was time to leave.

 

Back then… 그 땐

I had a huge crush on her back then.

Life seemed easier back then. 그 땐 삶이 쉽게만 보였어.

Back then, we never locked our doors.

 

At the time… 

I had no idea what was going on at the time.

The situation didn’t seem so bad at the time.

Who were you with at the time? 그 때 누구랑 있었어?