Well, sort of. Wikipedia pages are not, prima facie, reliable sources to be used for other wikipedia articles as a matter of policy – one is welcome to use the sources cited in such an article and evaluate them for use in citing an article, instead. They can be reliable, though, if one verifies the sources given. Wikipedia, especially areas that are highly trafficked and maintained, and therefore well-cited, can be among the better sources out there for many things.

I can't speak for the time-related stuff as a whole, but I've fixed a few things as I come across them.

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