Java Convert LocalDateTime to Calendar

Tags: Java LocalDateTime Java Calendar Java 8

In this Java core tutorial we learn how to convert a java.time.LocalDateTime object into java.util.Calendar object in Java programming language.

How to convert LocalDateTime to Calendar in Java

In Java to convert a LocalDateTime object to Calendar we can follow the steps below.

  • First step, convert the LocalDateTime to Instant object.
  • Second step, create new Date object from the above Instant.
  • Finally create new instance of Calendar and use setTime() method to set Date value.

import java.time.Instant;
import java.time.LocalDateTime;
import java.time.ZoneId;
import java.util.Calendar;
import java.util.Date;

public class ConvertLocalDateTimeToCalendarExample1 {
    public static void main(String... args) {
        LocalDateTime localDateTime =;
        Instant instant = localDateTime.atZone(ZoneId.systemDefault()).toInstant();
        Date date = Date.from(instant);
        Calendar calendar = Calendar.getInstance();

        System.out.println("LocalDateTime: " + localDateTime);
        System.out.println("Calendar: " + calendar);
The output as below.
LocalDateTime: 2022-04-24T13:20:43.148304
Calendar: java.util.GregorianCalendar[time=1650781243148,areFieldsSet=true,areAllFieldsSet=true,lenient=true,zone=sun.util.calendar.ZoneInfo[id="Asia/Bangkok",offset=25200000,dstSavings=0,useDaylight=false,transitions=3,lastRule=null],firstDayOfWeek=1,minimalDaysInFirstWeek=1,ERA=1,YEAR=2022,MONTH=3,WEEK_OF_YEAR=18,WEEK_OF_MONTH=5,DAY_OF_MONTH=24,DAY_OF_YEAR=114,DAY_OF_WEEK=1,DAY_OF_WEEK_IN_MONTH=4,AM_PM=1,HOUR=1,HOUR_OF_DAY=13,MINUTE=20,SECOND=43,MILLISECOND=148,ZONE_OFFSET=25200000,DST_OFFSET=0]

Happy Coding 😊

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