I have 2 questions: 1. When did this gold bikini trend begin? 2. Is it at the same time every year?

Enderice said in comment #2597546:

I have 2 questions: 1. When did this gold bikini trend begin? 2. Is it at the same time every year?

question 1: when, I don't know, just at some point people decided to draw girls in gold bikinis for golden week in Japan. question 2: yes, April 29 and May 3-5 are the holidays and people often just take the whole week off.

Enderice said in comment #2597546:

I have 2 questions: 1. When did this gold bikini trend begin? 2. Is it at the same time every year?

While gold bikinis have been around for decades, the trend to draw them on golden week started relativelty recently, with post #4494511.