This tag is for questions regarding Drupal 6 specifically. Version tags should be used only when strictly necessary, for questions that apply to Drupal version 6 only.
Drupal version 6 was officially released on February 13, 2008.
Use this tag only if your question relates specifically to this version.
Drupal 6 is currently the second supported version, together with Drupal version 7. It will be officially supported until Drupal 8 has reached it's first official release. After that, bugs will no longer be fixed for Drupal 6.