The 8052.com SBC hardware clock program fails to show the month name for months 10, 11, 12. The month name routine erroneously treats the BCD month number provided by the DS1307 as hex. I added the following lines to the routine following the DEC A line.

  .
  . 
   ;Display Month
   MOV DPTR,#MonthNames    ;Point to the month name table
   MOV A,R2                ;Get month (1-12)
   DEC A                   ;Now month is (0-11)

         (insert below lines)

   CJNE A,#09,Not09        ; Is Acc greater than 9?
   SJMP NoAdj              ; If ACC = 09 no adjustment needed
Not09:
   JC   NoAdj              ; If Acc <  09 no adjustment needed
   CLR  C                  ; prepare for subtract
   SUBB A,#06              ; adjust BCD to hex
NoAdj:
     (continue with existing code)
   CLR C                   ;Make sure carry is clear
   RLC A                   ;Multiply by 2
   RLC A                   ;Multiply by 4
   ADD A,DPL               ;Add low byte of DPL
   MOV DPL,A               ;Update value of DPL
   MOV A,DPH               ;Get value of DPH
   ADDC A,#00h             ;Add high byte
   MOV DPH,A               ;Update value of DPH
   LCALL SendLCDString     ;Display "Jan", "Feb", etc. on LCD
   MOV A,#' '              ;Send a space
   LCALL SendLCDText       ;Send the space
  .
  .
  .

Hope this helps others having the same problem. I'm confident there are more streamlined and really neat ways of doing this better, but it works for me.

Hal