Formal:
* Sannu da yamma: This is the most common and formal way to say "good evening". It literally means "peace with the evening".
Informal:
* Yamma lafiya: This is a more informal way to say "good evening" and means "evening peace".
* Yamma: This is the most casual way to say "good evening" and is just the word for "evening".
You can also use "Sannu" as a greeting at any time of day, similar to "hello".
The best option to use depends on your relationship with the person you are speaking to and the situation.