Unless you're using Joda Time, where YYYY means "year of era" and will be the same as yyyy for years since 1 CE. http://joda-time.sourceforge.net/apidocs/org/j

Unless you're using Joda Time, where YYYY means "year of era" and will be the same as yyyy for years since 1 CE. http://joda-time.sourceforge.net/apidocs/org/joda/time/format/DateTimeFormat.html http://joda-time.sourceforge.net/apidocs/org/joda/time/forma... http://joda-time.sourceforge.net/field.html#yearOfEra http://joda-time.sourceforge.net/field.html#yearOfEra