Explaining the [bracketed] section

At the start of every chapter, the reader will encounter a [bracketed] section. For example, Chapter one: Surprise demon attack starts off with the following:

[LU CAIN. US Railway Department camp, Mojave Wilderness, United States of America. Monday 14th of June, 1880 Gregorian Calendar].

This [bracketed] section sets the viewpoint, start location and start date of the story. So the above can be broken down as follows:

1) LU CAIN: Name of the viewpoint character. I write in third person viewpoint, which is the viewpoint used in many modern Western novels. For example Harry Potter and Song of Ice and Fire (Game of Thrones).

2) US Railway Department camp, Mojave Wilderness, United States of America.: The starting location. It lists the City (or local region). Then the country (or geographic region). Ending with the world (or dimension).

3) Monday 14th of June, 1880 Gregorian Calendar: The starting date. It lists the day, the date and the year (as well as the Dating system being used).