smeple:
Whenever I am reading stories about the moon, I always check the pocket Lunar calendar I carry around with me wherever I go, to make sure the author has included the correct phases of the moon, and that they correspond to the correct days of the week, month and year.
NOT!
I'm in agreement here, since that's an aspect of the story which I'm highly doubtful would be noticed by the overwhelming majority of posters.
If you'd made a mistake in history, I'd be much more likely to notice it if/when reading your account--I have pointed out historical incongruities in Library stories on occasion.
Back to Stephen King, in his time travel/alternate history novel
11/22/63, about stopping the Kennedy assassination, he apparently didn't know much about pro football history but nonetheless included a couple of such (inaccurate) references, presumably in order to provide period background for the early 1960s.
Well, I noticed those errors and they did annoy me a touch, since either he could have avoided mentioning them (as they weren't meaningful to the novel's plotline) or he could have done a few more minutes' worth of research to check out the facts rather than 'bluffing it through.' He obviously had researched the details of the assassination quite thoroughly.
(The book's premise that John F. Kennedy surviving the assassination plot would have proven disastrous to the United States, I didn't find it very convincing--but that was merely 'counterfactual' speculation, not objective fact, after all.)
If King had included incorrect data concerning the phases of the moon back in '63, however, I'm pretty certain that I'd have missed such a mistake...

--C.K.