Sean Harvey c02b4418bb BUGFIX Using DateField "dmyfields" option, if you set empty
day/month/year values, valueObj on DateField will contain erroneous values.
Check that all the value inputs aren't null or empty values BEFORE
calling Zend_Date on the value.
2012-03-27 14:46:09 +13:00
..
2009-03-22 22:59:14 +00:00