Change timezone to Apache server , PHP and MySql in XAMPP

I have installed XAMPP in my Windows machine and I want to alter the timezone in Apache HTTP server, PHP module and MySql in order to see proper dates in server error.log, access.log and php_error_log output.

After some searching I found the solution:

1. In httpd.conf (\xampp\apache\conf\httpd.conf) , add the following line:

   # Set timezone to Europe/Athens UTC+02:00
   SetEnv TZ Europe/Athens
   

2. Edit php.ini (\xampp\php\php.ini) date.timezone value in [Date] section:

   date.timezone = "Europe/Athens"
   

   You can find the available PHP timezones in http://php.net/date.timezone

3. In my.ini (\xampp\mysql\bin\my.ini) add or replace

   default-time-zone = "Europe/Athens"
   

Now restart Apache HTTP and MySQL server and you are done!