Creston is a town in the Kootenay region of southeastern British Columbia, Canada. Settlements on the east shore of Kootenay Lake and along …Creston is a town in the Kootenay region of southeastern British Columbia, Canada. Settlements on the east shore of Kootenay Lake and along BC Highway 3 from Creston to Yahk are among the few areas of Canada that do not observe daylight saving time, remaining on Mountain Standard Time year-round. Forming a natural boundary, the lake and the Kootenay Pass on the Salmo–Creston highway divide the Pacific Time Zone from the mountain one. When daylight saving ends, the time change migrates from Yahk to the Kootenay Bay ferry landing. Consequently, Creston in the warmer months is on Castlegar time and in the colder months on Cranbrook time.