Clock Changes in Prescott, Arizona, USA 2017

Daylight Saving Time (DST) Not Observed in Year 2017

USA observed Mountain Standard Time (MST) all year.

Daylight Saving Time has not been used since our records start, in 1970.

DST data from before 1970 is not available for Prescott, USA. However, we have earlier DST history for Phoenix, USA available.

Which countries & states use DST and which do not?