How To Convert Epoch time MilliSeconds to LocalDate and LocalDateTime in Java 8?

1. Overview

In this article, We'll learn how to convert the time from epoch milliseconds to LocalDate or LocalDateTime in java 8.

But, Converting epoch time to LocalDate or LocalDateTime can not be done directly so we need to convert first to ZonedDateTime and then next to needed type such as LocalDate or LocalDateTime.

Use Instant.ofEpochMilli(epochMilliSeconds).atZone(ZoneId.systemDefault()) method and next use either toLocalDate() or toLocalDateTime() methods.

2. Java 8 - Convert Epoch to LocalDate

Below is the sample program to get the LocalDate from epoch time.

In this program, first we have shown the step by step to get the required objects to get the LocalDate and finally shown the simplified the code in single line to get the same.

package com.javaprogramto.java8.dates.milliseconds;

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

/**
 * 
 * java Example to convert millisconds to LocalDate
 * 
 * @author JavaProgramTo.com
 *
 */
public class EpochMillisToLocalDate {

	public static void main(String[] args) {

		// current time in epoch format
		long epochMilliSeconds = 1608647457000l;
		
		// epoch time to Instant
		Instant instant = Instant.ofEpochMilli(epochMilliSeconds);
		
		// Instant to ZonedDateTime
		ZonedDateTime zonedDateTime = instant.atZone(ZoneId.systemDefault());
		
		// ZonedDateTime to LocalDate
		LocalDate localDate1 = zonedDateTime.toLocalDate();
		
		System.out.println("LocalDate 1 : "+localDate1);
		
		// simplified code
		LocalDate localDate2 = Instant.ofEpochMilli(epochMilliSeconds).atZone(ZoneId.systemDefault()).toLocalDate();

		System.out.println("LocalDate 2 : "+localDate2);
	}
}

Output:

LocalDate 1 : 2020-12-22
LocalDate 2 : 2020-12-22

3. Java 8 - Convert Epoch to LocalDateTime

The below example is to retrieve the LocalDateTime object from milliseconds.

package com.javaprogramto.java8.dates.milliseconds;

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

/**
 * 
 * java Example to convert millisconds to LocalDateTime
 * 
 * @author JavaProgramTo.com
 *
 */
public class EpochMillisToLocalDateTime {

	public static void main(String[] args) {

		// current time in epoch format
		long epochMilliSeconds = 1608647457000l;
		
		// epoch time to Instant
		Instant instant = Instant.ofEpochMilli(epochMilliSeconds);
		
		// Instant to ZonedDateTime
		ZonedDateTime zonedDateTime = instant.atZone(ZoneId.systemDefault());
		
		// ZonedDateTime to LocalDate
		LocalDateTime localDateTime1 = zonedDateTime.toLocalDateTime();
		
		System.out.println("LocalDateTime 1 : "+localDateTime1);
		
		// simplified code
		LocalDateTime localDateTime2 = Instant.ofEpochMilli(epochMilliSeconds).atZone(ZoneId.systemDefault()).toLocalDateTime();

		System.out.println("LocalDateTime 2 : "+localDateTime2);
	}
}

Output:

LocalDateTime 1 : 2020-12-22T20:00:57
LocalDateTime 2 : 2020-12-22T20:00:57

4. Conclusion

In this article, we've seen how to do conversion epoch millis to LocalDate or LocalDateTime in java 8.

GitHub

How to convert LocalDate to LocalDateTime object in java 8?