Dates and the pivot year

Birth and expiry dates use six digits: YYMMDD. Because the century is not stored, the reader must decide whether a two-digit year is in the past or the future using a pivot year (often the current year).

• ·Month must be 01-12 and the day must exist in that month.
• ·A date of birth cannot be in the future.
• ·An expiry date in the past makes the document expired (a warning, not an error).
• ·Unknown day or month may be filled with '<' in specific cases.

Source: Doc 9303 Part 3 — dates — reference/9303-standands/Doc 9303 - Part 3 - Machine Readable Travel Documents (1).html