# Package org.apache.commons.lang3.time

package org.apache.commons.lang3.time
Provides classes and methods to work with dates and durations. These classes are immutable (and therefore thread-safe) apart from `StopWatch`.

The time package contains some basic utilities for manipulating time (a delorean, police box and grandfather clock?). These include a `StopWatch` for simple performance measurements and an optimized `FastDateFormat` class.

Since:
  2.0

- Related Packages
  Package
  Description
  org.apache.commons.lang3
  Provides highly reusable static utility methods, chiefly concerned with adding value to the `java.lang` classes.
- Class
  Description
  CalendarUtils
  Helps use `Calendar`s.
  DateFormatUtils
  Date and time formatting utilities and constants.
  DateParser
  DateParser is the "missing" interface for the parsing methods of `DateFormat`.
  DatePrinter
  DatePrinter is the "missing" interface for the format methods of `DateFormat`.
  DateUtils
  A suite of utilities surrounding the use of the `Calendar` and `Date` object.
  DurationFormatUtils
  Duration formatting utilities and constants.
  DurationUtils
  Utilities for `Duration`.
  FastDateFormat
  FastDateFormat is a fast and thread-safe version of `SimpleDateFormat`.
  FastDateParser
  FastDateParser is a fast and thread-safe version of `SimpleDateFormat`.
  FastDatePrinter
  FastDatePrinter is a fast and thread-safe version of `SimpleDateFormat`.
  FastTimeZone
  Faster methods to produce custom time zones.
  StopWatch
  `StopWatch` provides a convenient API for timings.
  TimeZones
  Helps to deal with `TimeZone`s.