Some people have asked whether Windows supports new Japanese Calendar Emperor eras if that becomes necessary. FWIW That information is stored in the registry on Win7/Win8/.Net4.0+: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Nls\Calendars...

"Anonymous" asked a good question in a previous post " http://blogs.msdn.com/b/shawnste/archive/2006/02/17/klingon-in-piqad-windows-vista-custom-locale.aspx#10235416 ", basically leading to "what's the difference between a user locale and a system locale...

Sometimes you want to see what's in a built-in culture, or maybe you want to figure out what data's in an uplevel culture so that you can make a similar custom culture for an older OS. Here's an easy way to dump the LDML files for all of the cultures...