X'xyxy' to X'xyxyxyxyxyxyxyxy'
y is hexadecimal 0 to 9 and represents a date digit. x is hexadecimal 0 to F and is ignored.
X'zyyx' to X'zyyyyyyyyx'
y is hexadecimal 0 to 9 and represents a date digit. x is hexadecimal A to F and is ignored. The z part is normally zero but is not ignored.
'yy' to 'yyyyyyyy'
y is hexadecimal 0 to 9 and represents a date digit.