Mystylplx, who had personally been trumpeting the “defect” of the mm/dd/yyyy USA-style date format in the Lucas BC had a cow and went over to Wiki and changed the Kenya entry to reflect only dd/mm/yyyy (another commenter on Lucas'site caught her and she fessed up) but she didn't (or couldn't) change the original world map with Kenya in purple indicating dual date format use. That map is still there as of today.
As Mystylplx indicates, the original source for the dual date formats for Kenya was a Microsoft page which I think was a programming guide. Apparently someone at Microsoft has done worldwide research into date formats (of course) but Mystylplx tries to dis that research as being inadequate.
I hope that someone with more skill and access than I can look in the "way back" archived Wiki page to insure against any possiblility or charge that Lucas Smith messed with Wiki before Mystylplx messed with Wiki!
No need to bother with the Wayback Machine. It's useful for gazing into the past of a lot of web sites, but it's quite useless for watching the Wikipedia. Wikipedia pages can change way faster than the Wayback Machine can possibly keep up.
But fortunately, the Wikipedia contains its own Wayback Machine, which is directly synchronized to changes. If you are wondering about the history of a Wikipedia article, simply click its History tab (here, in the current instance). It will show you when each past edit took place and allow you to compare any two versions to see what was changed.