Formal:
* शुभ रात्री (Shubh Ratri) - This is the most common and formal way to say good night. It literally translates to "good night".
Informal:
* रात्रींचा शुभेच्छा (Ratrincha Shubhechha) - This is a more friendly way to say good night. It translates to "good night wishes".
* रात्रीच्या शुभेच्छा (Ratricha Shubhechha) - This is another informal option that translates to "good night wishes".
* गुड नाईट (Good Night) - This is a borrowed English phrase that is widely understood.
More casual:
* रात्री सुंदर जावो (Ratri sundar jaavo) - This translates to "have a beautiful night".
* रात्री आनंदी जावो (Ratri aanandi jaavo) - This translates to "have a happy night".
You can choose the appropriate phrase based on your relationship with the person you're talking to and the situation.