strange - unusual
You use strange to say that something is unfamiliar or unexpected in a way that makes you puzzled, uneasy, or afraid.
The strange thing was that she didn't remember anything about the evening.
It was strange to hear her voice again.
If you just want to say that something is not common, you use unusual, not ‘strange’.
He had an unusual name.
It is unusual for such a small hotel to have a restaurant.