Flickr Tag Error: Call to get metadata for photo '1068894333' failed.

Error state follows:

• type: 2048
• message: date() [function.date]: It is not safe to rely on the system's timezone settings. Please use the date.timezone setting, the TZ environment variable 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 'Europe/Berlin' for 'CEST/2.0/DST' instead
• file: /usr/home/love30pleasures.com/web/wp-includes/functions.php
• line: 66