import java.time.LocalDate;
import java.time.ZoneOffset;
 
public class Main {
	public static void main(String[] args) {
		//Test
		System.out.println(inMillis(2021,6,19,8,30));
	}
	public static long inMillis(int year, int month, int day, int hour, int min) {
	    return LocalDate.now()
	    		.atStartOfDay(ZoneOffset.UTC)
	    		.withYear(year)
	    		.withMonth(month)
	    		.withDayOfMonth(day)
	    		.withHour(hour)
	    		.withMinute(min)
	    		.toInstant()
	    		.toEpochMilli();
	}
}

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