Formal:
* آخر هفته خوبی داشته باشید. (Ākher hafteh khoobi dashte basheed.) This is a very polite and formal way to say it, suitable for professional or formal settings.
Informal:
* آخر هفته خوبی داشته باش. (Ākher hafteh khoobi dashte bash.) This is a more casual and friendly way to say it, suitable for friends and family.
* آخر هفته خوش بگذره. (Ākher hafteh khoosh begozarah.) This is a common and informal way to say it, literally meaning "have a nice weekend."
Other options:
* آخر هفته خوبی داشته باشی. (Ākher hafteh khoobi dashte bashi.) This is a slightly more affectionate and friendly way to say it.
* آخر هفته خوبی داشته باشید. (Ākher hafteh khoobi dashte basheid.) You can also use this to refer to multiple people.
You can also use other phrases like:
* مراقب خودت باش. (Moraqeb khodet bash.) This means "take care of yourself."
* دلت شاد باشه. (Delat shad basheh.) This means "be happy."
The best way to choose the right phrase is to consider your relationship with the person you are talking to and the situation.