Your PhP has invalid value for date time zone in your php.ini. You need to determine the correct setup for your timezone in your php.ini file.
Based on the error you are getting, it seems you have extension.so inclusion messed up with the timezone callback.
I did the following:
-->> Find the Customized php.ini file under the document root.
-->> There must a problem with the 'Timezone' line in php.ini which you can rectify.
-->> search for the string "Asia/calcutta" (based on your error... Read More...