On Sunday, November 5, 2017, most people in the United States set their clocks back one hour as Daylight Saving Time ended. This shift marked the return to Standard Time, providing more daylight in the morning and earlier darkness in the evening.
The transition affects scheduling, energy usage, and daily routines, making it useful to understand the exact date, regions involved, and historical context. The following sections clarify key details about the 2017 clock change and its broader implications.
| Event | Date in 2017 | Time Change | Regions Observing |
|---|---|---|---|
| Daylight Saving Time End | Sunday, November 5 | 2:00 AM → 1:00 AM | Most of U.S. (except Arizona, Hawaii) |
| Daylight Saving Time Start (2018) | Sunday, March 11 | 2:00 AM → 3:00 AM | Same regions |
| Legislative Reference | Energy Policy Act of 2005 | Effective 2007 onward | Federal law guidance |
| Next Year Comparison | November 4, 2018 | Same local time | Consistent pattern |
Daylight Saving Time End Mechanics in 2017
The mechanics of setting clocks back are straightforward but vary by region. In 2017, the rollback occurred at 2:00 AM local time, which repeated 1:00 AM twice.
Technical Process
Digital systems adjusted automatically, while manual clocks required users to turn the minute hand backward one hour. This ensures alignment with solar time and reduces confusion in public services.
Regional Observance and Exceptions
Not all areas followed the same schedule, and understanding exceptions helps avoid scheduling errors across time zones.
States That Do Not Observe DST
Arizona and Hawaii remained on Standard Time year-round in 2017, so residents did not set clocks back on November 5.
International Context
Countries in the European Union ended DST later in October, while Canada followed the same U.S. dates, creating brief mismatches in cross-border coordination.
Historical Context of the 2017 Change
The November 5, 2017 shift was the result of long-standing policy designed to extend evening daylight during warmer months.
Legislation Influence
The Energy Policy Act of 2005 extended DST starting in 2007, shaping the calendar used in 2017 and subsequent years.
Public Adaptation
Over time, people adjusted routines around the time change, influencing traffic patterns, energy demand, and workplace schedules.
Impact on Technology and Daily Routines
Modern devices adjusted automatically, but older systems and analog clocks required manual updates to stay accurate.
Scheduling Considerations
Events planned near the transition hour needed clarification, as repeated times occurred once clocks fell back.
Health and Safety Factors
Studies noted small increases in traffic incidents directly after the shift, highlighting the importance of vigilance during adjustment periods.
Key Takeaways for Future Reference
- Daylight Saving Time ended on November 5, 2017, at 2:00 AM local time.
- Most U.S. states observed the change, with exceptions for Arizona and Hawaii.
- Understanding the date helps with scheduling, device settings, and avoiding confusion.
- Technology simplified the transition, though manual checks remained useful for older devices.
- Policy changes from federal law shaped the schedule used in 2017 and beyond.
FAQ
Reader questions
Did the clocks fall back on November 5, 2017 everywhere in the U.S.?
No, Arizona and Hawaii did not observe the change and remained on Standard Time throughout the year.
What time did the change occur in 2017?
The clocks were set back at 2:00 AM local time, causing 1:00 AM to happen twice on Sunday, November 5.
Why was November 5 chosen for the 2017 clock change?
The date followed the federal rule that DST ends on the first Sunday in November, as defined by the Energy Policy Act of 2005.
Do all smartphone clocks update automatically for this shift?
Most devices with active time settings updated automatically, but users should verify that automatic updates were enabled to avoid errors.