120th meridian west
The meridian 120° west of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, North America, the Pacific Ocean, the Southern Ocean, and Antarctica to the South Pole.
The mean solar time at this meridian determines the time for the Pacific Time Zone (UTC−08:00) during standard time. Most of the year however, it is the meridian for Alaska Daylight Time, as daylight saving time is observed for nearly 2/3 of the year.
From Pole to Pole
Co-ordinates Country, territory or sea Notes 90°0′N 120°0′W Arctic Ocean 77°1′N 120°0′W Canada Northwest Territories — Prince Patrick Island 75°50′N 120°0′W M'Clure Strait 74°17′N 120°0′W Canada Northwest Territories — Banks Island 72°14′N 120°0′W Prince of Wales Strait 71°32′N 120°0′W Amundsen Gulf 69°21′N 120°0′W Canada Nunavut
Northwest Territories — passing through Great Bear Lake
British Columbia / Alberta border — from 60°0′N 120°0′W
British Columbia — from Intersection Mountain at 53°48′N 120°0′W; at this point the meridian meets the Continental Divide, and the boundary with Alberta diverts southeast
49°0′N 120°0′W United States Washington
Oregon — from 45°49′N 120°0′W
California / Nevada border (approximate) — from 42°0′N 120°0′W
California — from 39°0′N 120°0′W
34°27′N 120°0′W Pacific Ocean Santa Barbara Channel 33°59′N 120°0′W United States California — Santa Rosa Island 33°57′N 120°0′W Pacific Ocean 60°0′S 120°0′W Southern Ocean 73°44′S 120°0′W Antarctica Unclaimed territory