Formal:
* शुभ दिवस (shubh divas) - This is the most common and formal way to say "have a nice day."
* आपला दिवस सुंदर जावो (aapala divas sundar jaavo) - This translates to "May your day be beautiful."
Informal:
* छान दिवस घ्या (chhan divas ghya) - This is a more casual way to say "have a nice day."
* सुंदर दिवस (sundar divas) - This simply means "beautiful day."
More specific:
* आपल्याला छान दिवस जावो (aapalyala chhan divas jaavo) - This translates to "May you have a nice day."
* आपल्याला सुंदर दिवस जावो (aapalyala sundar divas jaavo) - This translates to "May you have a beautiful day."
You can choose the best option based on the situation and your relationship with the person you are speaking to.