In golang [documentation](http://golang.org/pkg/time/#pkg-constants), it is stated that :

> 
> These are predefined layouts for use in Time.Format and Time.Parse.
>  The reference time used in the layouts is:
> 
> 
> `Mon Jan 2 15:04:05 MST 2006`
> 
> 
> which is Unix time 1136239445
> 
> 
> 

What is the origin of this specific date ?