| Current: | MDT — Mountain Daylight Time |
|---|---|
| Next Change: | MST — Mountain Standard Time |
| Current Offset: | UTC/GMT -6 hours |
| Difference: | 2 hours behind Columbus |
2019 Time Zones - Boulder
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
The graph above illustrates clock changes in Boulder during 2019.
Time Changes in Boulder Over the Years
Daylight Saving Time (DST) changes do not necessarily occur on the same date every year.
| Year | Date & Time | Abbreviation | Time Change | Offset After |
|---|---|---|---|---|
| 2010 | Sun, Mar 14 at 2:00 am | MST → MDT | +1 hour (DST start) | UTC-6h |
| Sun, Nov 7 at 2:00 am | MDT → MST | -1 hour (DST end) | UTC-7h | |
| 2011 | Sun, Mar 13 at 2:00 am | MST → MDT | +1 hour (DST start) | UTC-6h |
| Sun, Nov 6 at 2:00 am | MDT → MST | -1 hour (DST end) | UTC-7h | |
| 2012 | Sun, Mar 11 at 2:00 am | MST → MDT | +1 hour (DST start) | UTC-6h |
| Sun, Nov 4 at 2:00 am | MDT → MST | -1 hour (DST end) | UTC-7h | |
| 2013 | Sun, Mar 10 at 2:00 am | MST → MDT | +1 hour (DST start) | UTC-6h |
| Sun, Nov 3 at 2:00 am | MDT → MST | -1 hour (DST end) | UTC-7h | |
| 2014 | Sun, Mar 9 at 2:00 am | MST → MDT | +1 hour (DST start) | UTC-6h |
| Sun, Nov 2 at 2:00 am | MDT → MST | -1 hour (DST end) | UTC-7h | |
| 2015 | Sun, Mar 8 at 2:00 am | MST → MDT | +1 hour (DST start) | UTC-6h |
| Sun, Nov 1 at 2:00 am | MDT → MST | -1 hour (DST end) | UTC-7h | |
| 2016 | Sun, Mar 13 at 2:00 am | MST → MDT | +1 hour (DST start) | UTC-6h |
| Sun, Nov 6 at 2:00 am | MDT → MST | -1 hour (DST end) | UTC-7h | |
| 2017 | Sun, Mar 12 at 2:00 am | MST → MDT | +1 hour (DST start) | UTC-6h |
| Sun, Nov 5 at 2:00 am | MDT → MST | -1 hour (DST end) | UTC-7h | |
| 2018 | Sun, Mar 11 at 2:00 am | MST → MDT | +1 hour (DST start) | UTC-6h |
| Sun, Nov 4 at 2:00 am | MDT → MST | -1 hour (DST end) | UTC-7h | |
| 2019 | Sun, Mar 10 at 2:00 am | MST → MDT | +1 hour (DST start) | UTC-6h |
| Sun, Nov 3 at 2:00 am | MDT → MST | -1 hour (DST end) | UTC-7h | |
| * All times are local Boulder time. | ||||
Data for the years before 1970 is not available for Boulder, however, we have earlier time zone history for Denver available.
More Information
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Thursday, April 25, 2024