INT 2F - Communicating Applications Specification - SET TASK DATE
        AX = CB0Bh
        BX = event handle (task event only)
        CX = year
        DH = month
        DL = day
Return: AX = 0000h successful
           < 0     error code (see AX=CB01h)
Note:   setting a task's date and time to before the current date and time
          causes it to execute immediately
SeeAlso: AX=CB0Ah,AX=CB0Dh