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Flag for U.S.A. Time zone in Boulder, Colorado, U.S.A.

9:28:23 PM MDT

Tuesday, March 31, 2015

Current: MDT
 Mountain Daylight Time

Next Change: MST
 Mountain Standard Time

Offset: UTC/GMT -6 hours

Difference: 2 hours behind Washington DC

Location of BoulderLocation

2015 Time Zones - Boulder

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

The graph above illustrates clock changes in Boulder during 2015.

Time Changes in Boulder over the years

Daylight Saving Time (DST) changes do not necessarily occur on the same date every year.

YearDate & TimeAbbreviationTime ChangeOffset After
2014Sun, Mar 9, 2:00 AMMSTMDT+1 hour (DST start)UTC-6h
 Sun, Nov 2, 2:00 AMMDTMST-1 hour (DST end)UTC-7h
2015Sun, Mar 8, 2:00 AMMSTMDT+1 hour (DST start)UTC-6h
 Sun, Nov 1, 2:00 AMMDTMST-1 hour (DST end)UTC-7h
2016Sun, Mar 13, 2:00 AMMSTMDT+1 hour (DST start)UTC-6h
 Sun, Nov 6, 2:00 AMMDTMST-1 hour (DST end)UTC-7h
2017Sun, Mar 12, 2:00 AMMSTMDT+1 hour (DST start)UTC-6h
 Sun, Nov 5, 2:00 AMMDTMST-1 hour (DST end)UTC-7h
2018Sun, Mar 11, 2:00 AMMSTMDT+1 hour (DST start)UTC-6h
 Sun, Nov 4, 2:00 AMMDTMST-1 hour (DST end)UTC-7h
* All times are local Boulder time. Next time change is highlighted.

Data for years before 1970 not available for Boulder, but we have earlier time zone history for Denver available.

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Boulder
U.S.A.
9:2823PM
Tuesday, March 31, 2015