No such thing as NVFR in the US. You are required to complete night flying as part of your PPL syllabus and consequently, any PPL holder is qualified to fly at night.
I remember coming back from the US and thinking "Struth, you mean I have to sit a separate test to be able to fly at night?" These days I tend to wonder how I managed to not kill myself flying in the US with only minimal night dual training and limited discussion on night navigation techniques/LSAlts etc. I'm sure that's not the standard applied throughout the US, but goes to show that you can get through without the right knowledge under that system.