Where would you restart the calendar?

[Jenny A]

I like Becc's beginning of the Renaissance though that's hard to date. You could pin it to Erasmus I suppose. Other really important sea change dates occur to me: Newton's death or birth or perhaps publication of Philosophiæ Naturalis Principia Mathematica; the publication date of Einstein's Theory of Relativity is another possible (I see Faith No More just beat me to this one); the dropping of the first atomic bomb; the inception of the internet.

I love to replace the current year one with the date of Socrates death. And then start the modern era with one of the above dates.