How should the Time Zone Offset from UTC handle daylight savings time?
NOTE: This guidance revises FMCSA-HOS-ELD-TECH-395-FAQ26, issued on September 1, 2017, and rescinded on March 10, 2022.
Frequently Asked Questions: Electronic Logging Devices and Hours of Service – Technical Specifications
Question: How should the Time Zone Offset from UTC handle daylight savings time?
Guidance: The rule calls for storing date/time information using UTC and transmitting data in the data file using the UTC offset in effect at the driver’s home terminal. This means that when daylight saving’s time is in effect at the home terminal, it should be included in the UTC offset. It would not be included in the UTC offset if daylight savings time is not in effect at the home terminal.
Contact Info: FMCSA ELD Information, 1-800-832-5660 or ELD@dot.gov.
Note: This guidance document does not have the force and effect of law and is not meant to bind the public in any way. It is intended only to provide information and clarity regarding existing requirements under the law or agency policies.