Background information
See here for background information on Content Certifications.
Go to the Certifications Tab
Select the article in the Content Administration area
Select the Certifications tab
Example of an article that has been certified
Do you see the "Certification Expires On" field?
You will see a date set in the Certification expires at field.
Before you can set a specific date for a certification expiration the article must first be certified. This article will show you how to do that.