There is no province-wide Canadian sidewalk clock
Some cities clear public sidewalks themselves; others place the duty on adjacent owners or occupants. Deadlines and winter-parking systems can be completely different within the same province. Every guide below now links to a direct official winter-rule source or the current authority route responsible for the rule.
41 Ontario city guides
AjaxMunicipal rule review pendingAuroraMunicipal rule review pendingBarrieCurrent official sourceBellevilleMunicipal rule review pendingBramptonCurrent official sourceBrantfordCurrent official sourceBurlingtonCurrent official sourceCaledonMunicipal rule review pendingCambridgeCurrent official sourceClaringtonMunicipal rule review pendingCornwallMunicipal rule review pendingGreater SudburyCurrent official sourceGuelphCurrent official sourceHamiltonCurrent official sourceKingstonCurrent official sourceKitchenerCurrent official sourceLondonCurrent official sourceMarkhamCurrent official sourceMiltonCurrent official sourceMississaugaCurrent official sourceNewmarketMunicipal rule review pendingNiagara FallsCurrent official sourceNorth BayCurrent official sourceOakvilleCurrent official sourceOrangevilleMunicipal rule review pendingOrilliaMunicipal rule review pendingOshawaCurrent official sourceOttawaCurrent official sourcePeterboroughCurrent official sourcePickeringMunicipal rule review pendingQuinte WestMunicipal rule review pendingRichmond HillCurrent official sourceSault Ste. MarieCurrent official sourceSt. CatharinesCurrent official sourceStratfordMunicipal rule review pendingThunder BayCurrent official sourceTorontoCurrent official sourceVaughanCurrent official sourceWaterlooCurrent official sourceWhitbyMunicipal rule review pendingWindsorCurrent official source