import java.time.Instant;
import java.time.LocalDate;
import java.time.ZoneId;

public class Main {
	public static void main(String[] args) {
		// Test
		System.out.println(toDate(1636120105L));
	}

	static LocalDate toDate(long timestamp) {
		return LocalDate.ofInstant(Instant.ofEpochSecond(timestamp), ZoneId.systemDefault());
	}
}