What does Saturday Night mean actually?

I'm just confused that most people always think that Saturday Night is a (very) special night. On a Saturday Night, some people tend to feel that "I must spend this night outside! I don't wanna stay at home!" 
However, some people just stay at home because they don't have any planning to go out on a Saturday Night. As I see, most couple (feel that they must) spend the Saturday Night together. So, single people are always teased by statements like this: "SatNite ngapain aja?" "SatNite di rumah aja?" "SatNite ditemenin siapa?" etc... (you can find more examples on social media).

I'm wondering, is there any special thing on Saturday Night? Does the time runs slower (or even stop) on Saturday Night? Do the stars in the sky shine brighter on Saturday Night? I don't know. For me, Saturday Night is just an ordinary night, it's just the same with the other nights.... (but you guys may have different opinion)

I'm not a "fan" of Saturday Night. Not because of I'm single. I'm not a type of person who like crowd. Many people go out and all you can find is full restaurants, full parking, etc. So, going out on Saturday Night is not a good choice for me

I ask you once again, what does Saturday Night mean actually? :)