What are MST, MDT and DST

Lisa C. Daily Life, Newcomer Information

In Canada, we change time twice a year — once in March and once in November.

  • Every March, we will advance clocks by one hour;
  • Every November, we will change back;

This is for saving energy and making better use of the natural daylight.

  • On March 14, Mountain Daylight Time (MDT) officially started.
  • Remember that MDT starts when the weather turns warmer, and ends when in November when winter begins.
  • When MDT ends, we switch back to Mountain Standard Time (MST).
  • MDT and MST are used for the specific time zone where Calgary is located.

Sometimes, you will see another abbreviation, DST, which stands for Daylight Savings Time.

Daylight Savings Time (DST) is a general term referring to the practice of advancing clocks during warmer months. Many countries and regions in the world observe DST, not only Canada.