# Day Definite Delivery Services

*Last updated: 2026-06-23*

> When a shipper books Day Definite Delivery Services, the carrier makes a contractual commitment to a named calendar date—not merely an estimated window.

When a shipper books Day Definite Delivery Services, the carrier makes a contractual commitment to a named calendar date—not merely an estimated window. That binding obligation is what distinguishes these services from standard offerings, where arrival timing is approximate at best. Real-time tracking, a written delivery guarantee, and compensation clauses for missed dates are standard features. Pharmaceuticals, medical devices, electronics, and fresh produce are the sectors most reliant on this level of service, as a late delivery can trigger production downtime, spoilage, or contractual penalties. Day Definite differs from Time Definite services, which fix the hour rather than the day.

**Source:** [https://www.fedex.com/en-us/shipping/day-certain.html](https://www.fedex.com/en-us/shipping/day-certain.html)

## Quick Facts

| Property | Value |
|---|---|
| Term | Day Definite Delivery Services |
| Language | EN |
| Word count | 100 |
| Last updated | 2026-06-23 |
| Source | https://www.fedex.com/en-us/shipping/day-certain.html |

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