The province of Saskatchewan has a law prohibiting the use of Daylight Saving Time (DST). But Lloydminster partly located in this province, is exempted from this law.
- Mountain Standard Time MST UTC-7
- --- Alberta ---,
- --- British Columbia
-- northeastern (''no'' DST)
-Most of Peace River Regional District except Fort Ware , Beatton River , Pink Mountain , Sikanni Chief , Buckinghorse River , Prophet River and Trutch
-- southeastern---
- Regional District Of East Kootenay ,
- Regional District Of Central Kootenay east of the Kootenay River and parts east of Kootenay Lake that are south of and including Riondel ( Creston ''doesn't'' observe DST), and
- Columbia-Shuswap Regional District east of the Selkirk Mountains ,
- --- Northwest Territories ---, except for Tungsten, Northwest Territories and the associated Cantung Mine (no DST)
- --- Nunavut ---
-- west of 102° West, and
-- all communities in the Kitikmeot Region ,
- --- Saskatchewan
-- Lloydminster and surrounding area--- (specifically exempted from the legal prohibition of DST in Saskatchewan)
- Central Standard Time CST UTC-6
- --- Manitoba ---,
- --- Nunavut
-- between 85° West and 102° West (except western Southampton Island )--- (Resolute, Repulse Bay, Baker Lake, west shore of Hudson Bay),
- --- Ontario ---
-- Northwestern Ontario west of 90° West (except Atikokan area, New Osnaburgh and Pickle Lake area, and Shebandowan and Upsala area), and Big Trout Lake area east of 90° West,
- --- Saskatchewan (except Lloydminster and surrounding area)
-- Creighton And Denare Beach Area ''does'' observe DST (unofficially, as Saskatchewan has a law prohibiting the use of DST)
- Eastern Standard Time EST UTC-5 , EDT UTC-4
- --- Nunavut
-- east of 85° West--- (Sanikiluaq, Cape Dorset, Hall Beach, Igloolik, Arctic Bay, Grise Fiord and all points east), and
-- entire Southampton Island (''no'' DST) (Coral Harbour),
- --- Ontario
-- east of 90° West (except Big Trout Lake area)---, plus
-- Atikokan area (''no'' DST),
-- New Osnaburgh and Pickle Lake area (''no'' DST), and
-- Shebandowan and Upsala area--- west of 90° West,
-- GTA ; Ottawa .
- --- Quebec (most of province)---
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