import java.time.Instant;
import java.time.LocalDateTime;
import java.time.ZoneId;
import java.time.ZonedDateTime;
import java.util.List;
 
class Main {
    public static void main(String[] args) {
        ZoneId zone = ZoneId.of("America/New_York");
 
        ZonedDateTime zdt = LocalDateTime.parse("2022-12-22T18:20:00.000")
                                         .atZone(zone);
        // Alternatively
        // zdt = ZonedDateTime.of(LocalDateTime.parse("2022-12-22T18:20:00.000"), zone);
 
        Instant instant = zdt.toInstant();
        System.out.println(instant);
    }
}

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