Android APIs
Added in API level 3
package

android.text.format

This package contains alternative classes for some text formatting classes defined in java.util and java.text. It also contains additional text formatting classes for situations not covered by java.util or java.text.

Classes

DateFormat Utility class for producing strings with formatted date/time. 
DateUtils This class contains various date-related utilities for creating text for things like elapsed time and date ranges, strings for days of the week and months, and AM/PM text etc. 
Formatter Utility class to aid in formatting common values that are not covered by the Formatter class in java.util  
Time An alternative to the Calendar and GregorianCalendar classes.