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<p>19 to July 25. <a href="page.php?w=Oodaaq">Oodaaq</a>, a gravel bank at the northern tip of Greenland and a disputed <a href="page.php?w=northernmost_point_of_land">northernmost point of land</a>, experiences this roughly from November 15 to January 27. Its antipode  experiences this roughly from May 13 to July 31.</p>

<p><big>True polar night</big></p>
<p>A true polar night is a period of continuous <a href="page.php?w=night">night</a> where no <a href="page.php?w=astronomical_twilight">astronomical twilight</a> occurs at the <a href="page.php?w=solar_culmination">solar culmination</a>.</p><p>
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