Shell Scripting Help

[chrisl at xp.etowns.net]

I have the following script: 

#!/usr/bin/ksh 
CURRMONTH=`date +%m` 
date '+%m %d %Y' | 
{ 
read MONTH DAY YEAR 
DAY6=`expr "$DAY" - 1` 
case "$DAY6" in 
0) 
MONTH=`expr "$MONTH" - 1` 
case "$MONTH" in 
0) 
MONTH=12 
YEAR=`expr "$YEAR" - 1` 
;; 
esac 
DAY6=`cal $MONTH $YEAR | grep . | fmt -1 | tail -1` 
esac 
echo "1 day ago was: $MONTH $DAY6 $YEAR" 

The value DAY6 would be 13 if run today. If it was run on the 10th it would be 9. 

I need to have DAY6 displayed as 09 and not just 9, is this possible? 



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