Time Zone: Dering lies in the Central Time Zone (CST/CDT) and observes daylight saving time. The time zone in French: CST- Heure Normale du Centre (HNC), CDT- Heure Avancée du Centre (HAC).
Note: If you leave Dering and travel west, you will leave Central Time and cross into the Central Standard Time Zone (CST). In addition, you will be moving from an area that observes daylight saving time to one that does not.
When there's a risk of an area code running out of phone numbers, an 'Overlay Area Code' is created that has the same geographic boundaries as the existing area code. In this case, the 204 code has been Overlayed with one of the following codes: 431 or 584. New phone numbers in the Dering area will be assigned with one of these codes: 204, 431 or 584. As a result, placing a call in the Dering area will require 10-digit dialing (where you enter both the area code and then the phone number).