When does a DOT card expire relative to the expiration date?

A DOT medical certificate, or DOT card, expires at midnight of the expiration date listed on the card. This means that until the very end of the day designated as the expiration date, the card remains valid. Once it hits midnight, however, the card is no longer usable for the purposes of meeting the requirements for operating a commercial motor vehicle.

Understanding the timing of expiration is crucial for drivers and their employers, as operating without a valid DOT card can lead to legal penalties and safety concerns. It is essential for drivers to be aware of when their certification ends, so they can schedule an appointment for re-evaluation ahead of time. This aspect of DOT regulations emphasizes the importance of maintaining current medical certifications to ensure ongoing compliance with safety standards.