when is issac newton's OFFCIALL birthday? I've have searched the web and cant seem to find it. The websites all have different information.
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M$2 Answers
The issue is that Dec. 25, 1642 is the "old style" (or OS) date of Newton's birth, which was in use in England at the time. There is a 10 day correction needed to go from dates in OS to "new style" (or NS) between 1500 and 1700 AD (http://en.wikipedia.org/wiki/Old_Style_and_New_Style_dates). Hence, Dec. 25, 1642 OS is Jan. 4, 1643 NS.
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M$
http://en.wikipedia.org/wiki/Isaac_Newton
For information on the difference in calendars, check out this link.
http://en.wikipedia.org/wiki/Old_Style_and_New_Style_dates
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M$
I voted this as "Best Answer." However, this answer can be improved by not putting URLs within parentheses, which confuse the URL code. Please compare those links within vs those without. Also, clarifying which styles followed the Julian and Gregorian calendars, respectively, would have provided the extra detail needed to make this answer exceptional. Since the second answer did address this issue, the choice for "Best Answer" was tough. Nevertheless, this answer did include an essential detail about the December birthday, which tipped my vote. Well done!