== Gregorian calendar in Hungary == 

 The article says: "They first lived in Appleton, Wisconsin, where his father served as Rabbi of the Zion Reform Jewish Congregation. From 1907 on, Houdini would claim in interviews to have been born in Appleton which was not true and on April 6, 1874, on the Gregorian calendar or 13 days difference from the Julian calendar (March 24, 1874) in Hungary at that time." 
 Actually, Hungary was one of the first state to adopt Gregorian calendar in 1587, 150 years before e.g. UK. I don't know it's source, but this must be a mistake and need to be corrected. http://en.wikipedia.org/wiki/Gregorian_calendar