Simple past

Use the Simple Past to express the idea that an action started and finished at a specific time in the past. Sometimes, the speaker may not actually mention the specific time, but they do have one specific time in mind.
Examples:

I saw a movie yesterday.
I didn't see a play yesterday.
Last year, I traveled to Japan.
Last year, I didn't travel to Korea.
Did you have dinner last night?
She washed her car.
He didn't wash his car.