🇺🇸 Denver daylight saving time (DST)
When the clocks change in Denver, the local UTC offset and any conversions shift with it. Exact transition dates and times below.
Current offset: UTC-06:00 (MT (MST/MDT))
This offset changes on the clock-change dates shown below.
2025 clock changes
| Date | Local change | Type | Offset |
|---|---|---|---|
| 2025-03-09 | 1:59 AM → forward 1h | Spring forward (DST starts) | UTC-07:00 → UTC-06:00 |
| 2025-11-02 | 1:59 AM → back 1h | Fall back (DST ends) | UTC-06:00 → UTC-07:00 |
2026 clock changes
| Date | Local change | Type | Offset |
|---|---|---|---|
| 2026-03-08 | 1:59 AM → forward 1h | Spring forward (DST starts) | UTC-07:00 → UTC-06:00 |
| 2026-11-01 | 1:59 AM → back 1h | Fall back (DST ends) | UTC-06:00 → UTC-07:00 |
2027 clock changes
| Date | Local change | Type | Offset |
|---|---|---|---|
| 2027-03-14 | 1:59 AM → forward 1h | Spring forward (DST starts) | UTC-07:00 → UTC-06:00 |
| 2027-11-07 | 1:59 AM → back 1h | Fall back (DST ends) | UTC-06:00 → UTC-07:00 |
FAQ
- Why does this matter for converting times?
- A correct timezone conversion must use the offset that applied on the target date. Around these transition dates, the same wall-clock time maps to different UTC instants — which is exactly what Denver's converter handles.
Other zones: New York, Los Angeles, Chicago, London, Paris.