Java Check if Instant is Week Day or Weekend Day

import java.time.DayOfWeek;
import java.time.Instant;
import java.time.ZoneId;
import java.time.ZonedDateTime;

public class DateUtil {

    /**
     * This method to check if an Instant object is a week day or not.
     * @param instant
     * @return
     */
    public static boolean isWeekDay(Instant instant) {
        ZonedDateTime zonedDateTime = instant.atZone(ZoneId.systemDefault());
        DayOfWeek dayOfWeek = zonedDateTime.getDayOfWeek();
        return (dayOfWeek != DayOfWeek.SATURDAY)
                && (dayOfWeek != DayOfWeek.SUNDAY);
    }

    /**
     * This method to check if an Instant object is a weekend day or not.
     * @param instant
     * @return
     */
    public static boolean isWeekend(Instant instant) {
        ZonedDateTime zonedDateTime = instant.atZone(ZoneId.systemDefault());
        DayOfWeek dayOfWeek = zonedDateTime.getDayOfWeek();
        return (dayOfWeek == DayOfWeek.SATURDAY)
                || (dayOfWeek == DayOfWeek.SUNDAY);
    }
}

import java.time.Instant;

public class CheckInstantWeekDayAndWeekendExample {
    public static void main(String... args) {
        Instant instant1 = Instant.parse("2022-08-19T07:30:40.00Z");
        Instant instant2 = Instant.parse("2022-08-20T07:30:40.00Z");

        // Check if an Instant is Week Day or not
        boolean isWeekDay1 = DateUtil.isWeekDay(instant1);
        boolean isWeekDay2 = DateUtil.isWeekDay(instant2);

        // Check if an Instant is Weekend Day or not
        boolean isWeekend1 = DateUtil.isWeekend(instant1);
        boolean isWeekend2 = DateUtil.isWeekend(instant2);

        System.out.println("instant1: " + instant1);
        System.out.println("instant2: " + instant2);

        System.out.println("\ninstant1 is week day: " + isWeekDay1);
        System.out.println("instant2 is week day: " + isWeekDay2);

        System.out.println("\ninstant1 is weekend: " + isWeekend1);
        System.out.println("instant2 is weekend: " + isWeekend2);
    }
}

instant1: 2022-08-19T07:30:40Z
instant2: 2022-08-20T07:30:40Z

instant1 is week day: true
instant2 is week day: false

instant1 is weekend: false
instant2 is weekend: true