datetime missing in stdout log file

Hi
I am having multiple project on tomcat server.
I get output and error logged in stdout file.
but when error logs in stdout file it done not get the output date an d time.

I like stdout log the error with date and time and the application name before logging the error.
like
[application name] [datetime]
[output]

this will help me to find out which application is throwing error

can anybody help me.

Thanks
Gagan