import java.time.Instant;
import java.time.LocalDate;
import java.time.ZoneOffset;

class Main {
    public static void main(String[] args) {
        long epochSeconds = 1664584019;
        Instant instant = Instant.ofEpochSecond(epochSeconds);
        System.out.println(instant);

        // Get LocalDate out of Instant
        LocalDate date = instant.atOffset(ZoneOffset.UTC).toLocalDate();
        System.out.println(date);
    }
}