parseString()
Constructs a Date from value. The parsing is based on the passed format pattern.
Syntax
Date parseString(String value, String format)
            - value is the string to be parsed.
 - format is the format pattern, which must be compatible with BDL.
 
Formatting symbols for dates
The formatting symbols can use either uppercase or lowercase letters.
| Character | Description | 
|---|---|
dd | 
                            Day of the month as a two-digit integer. | 
ddd | 
                            Three-letter English-language abbreviation of the day of the week, for example, Mon, Tue. | 
mm | 
                            Month as a two-digit integer. | 
mmm | 
                            Three-letter English-language abbreviation of the month, for example, Jan, Feb. | 
yy | 
                            Year, as a two-digit integer representing the two trailing digits. | 
yyyy | 
                            Year as a four-digit number. |