java.time.ZonedDateTime Class in Java

The ZonedDateTime class in Java represents a date and time together with a time zone. It stores date and time fields with nanosecond precision and a zone offset, making it useful for working with date and time across different time zones.

• ZonedDateTime is an immutable class that implements Temporal and ChronoZonedDateTime<LocalDate>.
• It provides methods to create, retrieve, format, compare, modify, and convert date-time values.

Example: Program creates a ZonedDateTime object using a date, time, and Asia/Kolkata time zone.

import java.time.LocalDate;
import java.time.LocalTime;
import java.time.ZoneId;
import java.time.ZonedDateTime;

public class GFG{
    public static void main(String[] args){
        LocalDate date = LocalDate.of(2026, 9, 8);
        LocalTime time = LocalTime.of(10, 30);
        ZoneId zone = ZoneId.of("Asia/Kolkata");

        ZonedDateTime dateTime = ZonedDateTime.of(date, time, zone);

        System.out.println("Zoned Date-Time: " + dateTime);
    }
}

Zoned Date-Time: 2026-09-08T10:30+05:30[Asia/Kolkata]

Explanation: The of() method combines the specified LocalDate, LocalTime, and ZoneId to create a ZonedDateTime object.

Syntax

public final class ZonedDateTime
extends Object
implements Temporal, ChronoZonedDateTime<LocalDate>, Serializable

Ways to Use ZonedDateTime

The ZonedDateTime class provides methods for retrieving date-time fields, creating date-time objects, performing calculations, and converting between different date-time representations.

1. Using parse() Method

The parse() method creates a ZonedDateTime object from a text representation containing a date, time, offset, and time zone.

import java.time.ZonedDateTime;

public class GFG {
    public static void main(String[] args) {

        String text =
            "2011-10-02T14:45:30.123456789+05:30[Asia/Kolkata]";

        ZonedDateTime dateTime = ZonedDateTime.parse(text);

        System.out.println(dateTime);
    }
}

2011-10-02T14:45:30.123456789+05:30[Asia/Kolkata]

Explanation: The program uses ZonedDateTime.parse() to parse the given text and create a ZonedDateTime object containing the date, time, offset, and time zone.

2. Using of() Method

The of() method creates a ZonedDateTime from a LocalDate, LocalTime, and ZoneId.

import java.time.LocalDate;
import java.time.LocalTime;
import java.time.ZoneId;
import java.time.ZonedDateTime;

public class GFG {
    public static void main(String[] args) {

        LocalDate date = LocalDate.of(2026, 9, 8);
        LocalTime time = LocalTime.of(10, 30);

        ZoneId zone = ZoneId.of("Asia/Kolkata");

        ZonedDateTime dateTime =
            ZonedDateTime.of(date, time, zone);

        System.out.println(dateTime);
    }
}

2026-09-08T10:30+05:30[Asia/Kolkata]

Explanation: The program creates a date, time, and time zone separately and combines them into a ZonedDateTime object using of().

Commonly Used Methods of ZonedDateTime

Note: ZonedDateTime stores a date, time, time-zone ID, and the corresponding offset. The offset can vary for a time zone because of rules such as daylight saving time.