Request a Copy of your Certificate of Naturalization. The Certificate of United States Naturalization Guide was developed to help naturalized U.S. citizens complete and file their own requests for a copy of their Certificate of Naturalization.
A polar day refers to a day when the sun does not set for 24 hours. This occurs because the top of the earth tilts toward the sun during one half of the year. Areas in the very northern and very southern parts of the globe are the only regions that experience both polar days and polar nights.
Why do midnight sun and polar night occur? Earth completes one rotation around the sun every 24 hours, which causes the change between day and night. The earth is tilted by about 23.5 degrees on its axis. If Earth was to be perpendicular to its axis, then we would have 12 hours of daylight and 12 hours of night every day on every part of the earth throughout the year.