The yellow years are ones in which the USA was getting into or out of major wars — or both, in the case of the brief Spanish-American War. The red years are war years, and the blue years are years of (relative) peace.
The sectors are each bounded by two radii, and a 1.5° arc. The current year is omitted intentionally because 2016 isn’t over yet, and we don’t know what will happen during the rest of it.
The day on this planet is 84,600 seconds long. That’s not far from 100,000 — so we could shorten the second a bit, call it something else, and get 100,000 of them each day to create a decimal clock. 100 of these “jiffies” could make a “stretch,” and then 100 “stretches” could make a deciday (the new version of an hour). Ten decidays, of course, make a day, so these neo-hours are pretty long, compared to the hours we’re used to experiencing. This is just practice for making an improved 10-month calendar, of course.
Why go to all this trouble? To get rid of astrology forever, that’s why!