Lloydminster is a Canadian city which has the unusual geographic distinction of spanning the provincial border between Alberta and Saskatchewan. The Lloydminster area was first settled in April, 1903. This newly founded settlement was located astride the 4th Meridian in the Northwest Territories. When the provinces of Alberta and Saskatchewan were created in 1905 and the 4th Meridian selected as the inter-provincial boundary, the Village of Lloydminster was split in two.
Unlike most such cases (such as Texarkana in the southern United States), Lloydminster is not a pair of twin cities on opposite sides of a border which merely share the same name, but is actually incorporated as a single city with a single municipal administration.
The provincial border runs north to south, falling directly on 50th Avenue (Meridian Avenue) in the centre of Lloydminster. Addresses east of 50th Avenue are considered to be in Lloydminster, Saskatchewan and addresses west of 50th Avenue are considered to be in Lloydminster, Alberta.
Lloydminster's distinctive situation is reflected in other legal matters, including its time zone. Alberta law requires the use of daylight saving time, while Saskatchewan does not observe daylight saving time. Lloydminster's charter allows it to follow Alberta's use of daylight saving time on both sides of the provincial border; this places the city in the Mountain Standard Time Zone and synchronizes clocks with those of Alberta.
City of Lloydminster official website