EDIT: New PHP = new pnp.inf = need to set Timezone in it... user error, but in case anyone else runs into this, they can learn from my stupidity :)

I was running Kohana 2.3.2. Upgraded PHP to 5.3.0, and was treated to this on every page of my site:

===

Warning: date_default_timezone_get() [function.date-default-timezone-get]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/New_York' for 'EDT/-4.0/DST' instead in /Library/WebServer/Documents/system/core/Kohana.php on line 136

===

Upgraded Kohana to 2.3.4, same error (different line number, I think =)

Server info: Apache/2.2.11 (Unix) mod_ssl/2.2.11 OpenSSL/0.9.7l DAV/2 PHP/5.3.0

The fix is pretty straightforward, I will replace:

date_default_timezone_set(empty($timezone) ? date_default_timezone_get() : $timezone);

With:

date_default_timezone_set(empty($timezone) ? 'UTC' : $timezone);

But I don't know if this will be a common problem with PHP 5.3.x and needs to be addressed, or if it's just a rarity.

You have to set the timezone in your php.ini. Make sure it's set.

I also ran into this issue on Kohana 2.3.4 and PHP 5.3.0 and resolved it thanks to this thread. Since the error is a bit cryptic, seems to me like it'd be straightforward to add a Timezone check to install.php, like:

<?php if (strlen(ini_get('date.timezone')) > 0): ?>
...
<td class="fail">Must set date.timezone in php.ini.</td>

I had a "stock" install of PHP 5.3.0 with minimal customization on a Windows environment - I guess timezone defaults to unset. Anyway, thanks for the info.