How Friday can be black day?

I like to express an instant, funny, real scene that was in every way took place before our bare eyes. I closely looked at the two brothers of different ages putting on a loose black dress enthusiastically. 

They were not so talkative with each other quickly pointed out that it was certainly

Friday today, then why do we wear a black dress, causing us to realise that today happens to be a black day. 

People did not control themselves, saying that today is a black day only because of their black clothes. 

That's why they appear in black dresses. This was indeed not a logical point at first, but it seemed to be only a laughing joke at the very moment. 

How can Friday be a black day? Friday remains the fifth day of the week. It rotates every other week in a month. Then putting on a black dress on a day can not hint at a black day.

We must be practical because it is never known what’s going to happen the next moment, but this black day pushes us to realise in a relatively suffocating situation that’s never been seen in two distinct parts.  

This transpired to be a unique situation that has always challenged routine, remaking bold ideas into creative ones.

It actually shapes history. The spirit of innovation and fearless creativity has more often inspired generations in every authentic aspect.