Clock Changes in Sedona, Arizona, USA 1999

Daylight Saving Time (DST) Not Observed in Year 1999

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 Sedona, USA. However, we have earlier DST history for Phoenix, USA available.

Which countries & states use DST and which do not?