Date Formatter is a concrete class that enables locale-dependent formatting/parsing
of dates using pattern strings and/or canned patterns.
This class represents the ICU date formatting functionality.
It allows users to display dates in a localized format or to parse strings
into PHP date values using pattern strings and/or canned patterns.
Most abbreviated style, only essential data (12/13/52 or 3:30pm)
The following int constants are used to specify the calendar.
These calendars are all based directly on the Gregorian calendar.
Non-Gregorian calendars need to be specified in locale.
Examples might include locale="hi@calendar=BUDDHIST".