We use the past simple to talk about actions and states which we see as completed in the past.We can use it to talk about a specific point in time.
• She came back last Friday.
• I saw her in the street.
• They didn't agree to the deal.
It can also be used to talk about a period of time.
• She lived in Tokyo for seven years.
• They were in London from Monday to Thursday of last week.
• When I was living in New York, I went to all the art exhibitions I could.