Internationalizing Data on Mac and iPhone

Mac OS X and iPhone OS have a rich model for processing and presenting language and locale-specific information such as dates, times, numbers, calendars, and time zones. Avoiding common mistakes when handling international data is critical to making your application ready for a global audience. Get the detailed knowledge you need to make your application shine no matter where in the world your users are.

WWDC 2010 - iOS, macOS