I just ran into a strange issue. For seemingly no reason a fresh local install of SS via Composer, I'm getting the date.timezone in my php.ini file error when I run the installer. I'm 100% positive my ini file is correct. Adding "php_value date.timezone America/Los_Angeles" to my .htaccess file removes the error and now I can install, but I'm wondering what the cause of this error is to avoid the headache in the future. Any suggestions?
FYI - This is an old issue, at least since 2011: http://www.silverstripe.org/community/forums/installing-silverstripe/show/15398/