Type IDateTimeFormat

Interface --+    
            |    
      IFormat --+
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               IDateTimeFormat

DateTime formatting and parsing interface. Here is a list of
possible characters and their meaning:

  Symbol Meaning               Presentation      Example

  G      era designator        (Text)            AD
  y      year                  (Number)          1996
  M      month in year         (Text and Number) July and 07
  d      day in month          (Number)          10
  h      hour in am/pm (1-12)  (Number)          12
  H      hour in day (0-23)    (Number)          0
  m      minute in hour        (Number)          30
  s      second in minute      (Number)          55
  S      millisecond           (Number)          978
  E      day in week           (Text and Number) Tuesday
  D      day in year           (Number)          189
  F      day of week in month  (Number)          2 (2nd Wed in July)
  w      week in year          (Number)          27
  W      week in month         (Number)          2
  a      am/pm marker          (Text)            pm
  k      hour in day (1-24)    (Number)          24
  K      hour in am/pm (0-11)  (Number)          0
  z      time zone             (Text)            Pacific Standard Time
  '      escape for text
  ''     single quote                            '

Meaning of the amount of characters:

  Text

    Four or more, use full form, <4, use short or abbreviated form if it
    exists. (for example, "EEEE" produces "Monday", "EEE" produces "Mon")

  Number

    The minimum number of digits. Shorter numbers are zero-padded to this
    amount (for example, if "m" produces "6", "mm" produces "06"). Year is
    handled specially; that is, if the count of 'y' is 2, the Year will be
    truncated to 2 digits. (for example, if "yyyy" produces "1997", "yy"
    produces "97".)

  Text and Number

    Three or over, use text, otherwise use number. (for example, "M"
    produces "1", "MM" produces "01", "MMM" produces "Jan", and "MMMM"
    produces "January".)