Calendar JSP taglib date formats
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Dates are entered in traditional formats. Fixed length dates may contain 8 numeric values with separator characters of '-' or '/' embedded. Supported formats include: YYYY-MM-DD, YYYY/MM/DD, MM-DD-YYYY, MM/DD/YYYY, YYYYMMDD, and MMDDYYYY.

Predictive date translation
Predictive date formatting translates the date into year, month, and day based on the values provided. Variable length dates are translated based on length. Lengths of 4 to 8 numeric values are supported. Based on length, the default formats are MDYY, MDDYY, MMDDYY, MDDYYYY, or MMDDYYYY.