Johannes Secundus may have been born November 10, not November 15

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My dilemma: I don't know anything about Johannes Secundus.

I want to know his birth date. Wikipedia says "November 15, 1511" but Google books copy of The Basia of Joannes Secundus says in the preface that he was born November 10, 1511. See here: http://books.google.com/books?id=KzAPAAAAIAAJ&dq=Janus+Secundus,&printsec=frontcover&source=bl&ots=fbuUK47DRO&sig=1DtnSp7kthRp5mAyGjvQ0uJGsSc&hl=en&ei=Q7j-StC_Dsa0tgfP3emRDg&sa=X&oi=book_result&ct=result&resnum=10&ved=0CB8Q6AEwCTgK#v=onepage&q=&f=false

However, at that time the Julian calendar was being used, not our present-day Gregorian calendar. I don't know how or if birth months and days shift into our present-day calendar.

What to do? —Preceding unsigned comment added by Wikiesd (talkcontribs) 14:40, 14 November 2009 (UTC)Reply