Year-field displays as one year early when user's timezone is negative

PHP 5.2.9
MySQL 5.0.51a
CCK 6.x-2.4
Date 6.x-2.4

Steps to reproduce;

• Create a content type with this "Year only" field definition (which was created via the UI and exported using content copy module)
  

  $content['type']  = array (
    'name' => 'Annual Report',
    'type' => 'annual_report',
    'description' => 'An <em>annual report</em> is where CSF\'s Annual Reports can be uploaded.',
    'title_label' => 'Title',
    'body_label' => 'Blurb about this annual report',
    'min_word_count' => '0',
    'help' => '',
    'node_options' => 
    array (
      'status' => true,
      'promote' => true,
      'sticky' => false,
      'revision' => false,
    ),
    'language_content_type' => '0',
    'i18n_node' => '1',
    'i18nsync_nodeapi' => 
    array (
      'name' => false,
      'status' => false,
      'promote' => false,
      'moderate' => false,
      'sticky' => false,
      'revision' => false,
      'parent' => false,
      'taxonomy' => false,
      'comment' => false,
      'field_file' => false,
      'field_required_image' => true,
      'field_year' => true,
    ),
    'old_type' => 'annual_report',
    'orig_type' => '',
    'module' => 'node',
    'custom' => '1',
    'modified' => '1',
    'locked' => '0',
    'content_profile_use' => false,
    'comment' => '0',
    'comment_default_mode' => '2',
    'comment_default_order' => '2',
    'comment_default_per_page' => '50',
    'comment_controls' => '3',
    'comment_anonymous' => '1',
    'comment_subject_field' => '1',
    'comment_preview' => '1',
    'comment_form_location' => '1',
    'ant' => '1',
    'ant_pattern' => '[field_year-yyyy] Annual Report',
    'ant_php' => 0,
    'vertical_tabs_fieldsets' => 
    array (
      'book' => 1,
      'revision_information' => true,
      'author' => true,
      'options' => true,
      'menu' => true,
      'comment_settings' => true,
      'path' => true,
      'attachments' => 1,
    ),
  );
  $content['fields']  = array (
    0 => 
    array (
      'label' => 'Year',
      'field_name' => 'field_year',
      'type' => 'date',
      'widget_type' => 'date_select',
      'change' => 'Change basic information',
      'weight' => '-1',
      'default_value' => 'now',
      'default_value2' => 'same',
      'default_value_code' => '',
      'default_value_code2' => '',
      'input_format' => 'Y-m-d H:i:s',
      'input_format_custom' => '',
      'year_range' => '-20:+3',
      'increment' => '1',
      'advanced' => 
      array (
        'label_position' => 'none',
        'text_parts' => 
        array (
          'year' => 0,
          'month' => 0,
          'day' => 0,
          'hour' => 0,
          'minute' => 0,
          'second' => 0,
        ),
      ),
      'label_position' => 'none',
      'text_parts' => 
      array (
      ),
      'description' => '',
      'required' => 1,
      'multiple' => '0',
      'repeat' => 0,
      'todate' => '',
      'granularity' => 
      array (
        'year' => 'year',
      ),
      'default_format' => 'field_year_default',
      'tz_handling' => 'none',
      'timezone_db' => '',
      'op' => 'Save field settings',
      'module' => 'date',
      'widget_module' => 'date',
      'columns' => 
      array (
        'value' => 
        array (
          'type' => 'varchar',
          'length' => 20,
          'not null' => false,
          'sortable' => true,
          'views' => true,
        ),
      ),
      'display_settings' => 
      array (
        'weight' => '-1',
        'parent' => '',
        'label' => 
        array (
          'format' => 'hidden',
        ),
        'teaser' => 
        array (
          'format' => 'hidden',
          'exclude' => 0,
        ),
        'full' => 
        array (
          'format' => 'hidden',
          'exclude' => 0,
        ),
        2 => 
        array (
          'format' => 'field_year_default',
          'exclude' => 0,
        ),
        3 => 
        array (
          'format' => 'hidden',
          'exclude' => 0,
        ),
        4 => 
        array (
          'format' => 'hidden',
          'exclude' => 1,
        ),
        'token' => 
        array (
          'format' => 'field_year_default',
          'exclude' => 0,
        ),
      ),
    ),
  );
  $content['extra']  = array (
    'title' => '1',
    'body_field' => '0',
    'language' => '-4',
    'menu' => '2',
  );
  

• As a user with neutral or positive timezone, create/edit a node and set the year value
• Note that the year displays correctly on node view
• As a user with a negative timezone, e.g. America/Los Angeles, create/edit a node and set the year value
• Note that the year is one year earlier than the input year

A simpletest would be useful to avoid regression of this bug.