Creates a new DateTimeFormatter that uses the JIRA default time zone, locale, and relative date style. To get a "smart" formatter that automatically uses the time zone and locale of the
currently logged in user, create a new formatter by calling DateTimeFormatter.forLoggedInUser() on the formatter returned by this method, e.g.:
DateTimeFormatter userFormatter = dateTimeFormatterFactory.formatter().forLoggedInUser();
Note that since JIRA 5.0 you can get a
DateTimeFormatter injected directly into your class (in that case
there is no need to use this factory class).
A formatter obtained in this fashion may be safely reused across requests.