anchor.diff:  ** 'DD-MON-YYYY'
   ** 'DDMONYYYY'
   
  +Here, YYYY refers to a 4-digit year. YY refers to a two-digit year. MM refers to a two-digit month. MON refers to
  +a three-letter abbreviation for month ('JAN', 'FEB', 'MAR', 'APR', 'MAY', 'JUN', 'JUL', 'AUG', 'SEP',
  +'OCT', 'NOV' or 'DEC'). The month may be given in lower case, upper case or any mixture.
  +
   If the _format-string_ argument is omitted, 'YYYY-MM-DD' is used as the
   default.
   
  
positive.code: ** 'MONTH DD, YYYY, HH:MI'
  ** 'DD.MM.YYYY HH24.MI.SS'
  
  [[considerations_for_to_time]]
  === Considerations for TO_TIME
  
  
negative.code: 
  * `_character-expression_`
  +
  is an expression that gives a character value. The expression ia assumed to have the format YYYY-MM-DD HH:MI:SS[.FFFFFFF],
  where YYYY is a 4-digit year, MM is a 2-digit month, DD is a 2-digit day, HH is a 2-digit hours field, MI is a 2-digit
  minutes field, SS is a two-digit seconds field and FFFFFF is an optional microseconds field.
  
  [[examples_of_to_timestamp]]
  === Example of TO_TIMESTAMP
  