.
  . 
   ;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
  .
  .
  .