The i18n Cookbook - recipies for a global society

Calendars and date formatting are central to a properly internationalized application.  Java provides several classes that are very useful to the localization developer for handling dates and times. 
 
Java's Calendar class and its sub-classes handle the complex date calculations that go with Chinese, Islamic, Hebrew, and Gregorian calendars, as well as a number of others.
 
Java's DateFormat class handles formatting dates and times in a locale appropriate manner.
 
The DateFormatSymbols class contains localized information for date parts like weekdays, eras, months, etc...