Conflicting information in the link. My best guess is 2010 Month 11.The only way to be sure is to phone them.EDIT to Add./ I just noticed you typed 'Whirpool', I have edited your post but am not able to edit my link. When it opens, add the 'L' and press Enter.https://www.google.com/search?q=How+old+is+Whirpool+Gas+Range..