Formal:
* शुभ रात्रि (Shubh Raatri): This is the most common and formal way to say goodnight. It literally translates to "auspicious night."
Informal:
* शुभ रात्रि (Shubh Raatri): This can also be used informally, but it's slightly more formal than the next two options.
* रात शुभ हो (Raat Shubh Ho): This translates to "may your night be good."
* गुड नाइट (Good Night): This is the English word, which is often used in informal settings.
Other options:
* स्वप्न सुंदर हो (Swapna Sundar Ho): This translates to "may your dreams be beautiful."
* कल मिलते हैं (Kal Milte Hain): This translates to "see you tomorrow," and is often used instead of "goodnight" with friends and family.
The best way to choose which phrase to use is to consider your relationship with the person you are talking to. If you are talking to someone you don't know well, it is best to use the more formal phrase "शुभ रात्रि (Shubh Raatri)." If you are talking to a friend or family member, you can use a more informal phrase like "रात शुभ हो (Raat Shubh Ho)" or "गुड नाइट (Good Night)."