Wikiday is an idea to break up the 24 hour day into three color zones, to make for easier real-time meeting and coordination. The graph is intended to make understanding time zone shifts easier, by using color to represent the local time of day: from light blue morning to orange dusk to dark blue late night. Vertically, the zones are placed in same-time relation to each other.
The three main timezones used are CHT (China), GMT (Europe), and PST (America). Where green and blue meet represents the only reasonable common meeting timeframe for all zones, namely late night in China, afternoon Europe, and early morning in the United States.
A day progresses from left to right. If GMT 12:00 is the base, PST localtime is early morning, and China time is 8pm evening, etc.
The edit counter and IRC stats also contain information about when people are active.
Wikinews:Wikiday