How do you say weekend in Chinese using the 星期 form? I know that weekend in Chinese is generally translated as 周末. 

Is there a way to say weekend by adding something to 星期 like 星期末? Or the only phrase for weekend is 周末?
How about 星期六、日？
Weekdays can be combined like 星期一、三、五. It might be an alternative to 周末? 
Looking forward to other input from members.