Ho can i grep for yestdarday's data in unix

I have the date field in my log file in the format shown below..

(07/23/2009 03:54:02.107)aaaaaa bbbbbb

I want to grep for month/date(7/23) field of yestdarday's data.
found the below command in this forum which is not working in my SUN Solaris box.
date -d "yesterday" +"%d %b %Y"

Please suggest me any other alternatives...

try grep '/07/23/' > results.txt

try this for yesterdays date::

yesterday=`TZ=CST+24 date`
echo $yesterday

Thanks a lot PRKS...It worked perfectly.