I'm trying to make a table visible to Views. One of the columns has type date (as opposed to a Unix timestamp). The example I initially tried to copy from is in modules/comment.views.inc in the Views module:

// timestamp (when comment was posted)
  $data['comments']['timestamp'] = array(
    'title' => t('Post date'),
    'help' => t('Date and time of when the comment was posted.'),
    'field' => array(
      'handler' => 'views_handler_field_date',
      'click sortable' => TRUE,
    ),
    'sort' => array(
      'handler' => 'views_handler_sort_date',
    ),
    'filter' => array(
      'handler' => 'views_handler_filter_date',
    ),
  );

This makes the dates, which are all in the past year or so, show up as "1 Jan 1970 00:33", so evidently a value of '2010-05-12', for example, is being interpreted as 2010 seconds past 1 Jan 1970 00:00.

Can anyone point me to a correct way of exporting date columns?

EDIT: I'm following up on some clues found at http://drupal.org/node/476774 .