the Alaskan island of kiska was captured by the Japanese and was
latter taken by the U.S. and Canada
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If there is not a birthday every year, they must have been born
on Leap Year's Day.
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As of my knowledge cutoff in 2021, Kiska is an uninhabited island in the Rat Islands group of the Aleutian Islands in Alaska, United States. Therefore, it does not have a permanent population.