Arctic Circle: This is the region located north of the Arctic Circle (66.5°N latitude), which includes parts of northern Alaska, Canada, Greenland, Norway, Sweden, Finland, Russia, and Iceland. During the summer months (late May to late July), the sun remains continuously visible above the horizon for at least one full day. This phenomenon is known as the midnight sun or polar day. Conversely, during the winter months (late November to late January), the sun remains continuously below the horizon for at least one full day, resulting in a period of complete darkness called the polar night.
Antarctic Circle: Similarly, the region located south of the Antarctic Circle (66.5°S latitude), which encompasses most of Antarctica, experiences periods of continuous daylight during its summer (late November to late January) and continuous darkness during its winter (late May to late July). Due to the tilt of the Earth's axis, the Northern and Southern Hemispheres have opposite seasons, so when the Arctic Circle experiences polar day, the Antarctic Circle experiences polar night, and vice versa.
