**Partial Answer**

>! The first step is to solve the "[magic eye](https://en.wikipedia.org/wiki/Magic_Eye) / [autostereogram puzzle](https://en.wikipedia.org/wiki/Autostereogram)". By crossing your eyes and moving the picture back and forth, an image should float up.   
>!  
>! [![autosterogram][1]][1]  
>!  
>! Not sure what to do after that, though. I can't really think of a way to describe the "technique" used to "see" an autostereogram, nor do I understand what the solved autostereogram is referring to. If I assume that "I" refers to the autostereogram itself, there are still many dates involved in the history and creation of autostereograms.


  [1]: https://i.sstatic.net/kp39R.png