| Cryptographic Token Interface Standard | 
 PKCS#11  | 
Data Fields | |
| CK_CHAR | year [4] | 
| CK_CHAR | month [2] | 
| CK_CHAR | day [2] | 
| year | the year ("1900" - "9999") | 
| month | the month ("01" - "12") | 
| day | the day ("01" - "31") | 
The fields hold numeric characters from the character set in Table 4 -3, not the literal byte values.