Date from unix timestamp javascript

Timestamp to DateTime in JavaScript

In this post, we are going to learn how to convert Timestamp to DateTime in JavaScript with example. First, we will learn how to get Unix timestamp in Javascript and convert this to datetime and different timezone.

How to Get Unix timestamp in Javascript

To convert a UNIX timestamp to date, the first step is to get the current timestamp in Javascript or even you can use a hard code value

2 ways to get Unix timestamp in Javascript

• By using the getTime()
• Get timestamp from a given date: we have to convert it into milliseconds by multiplying 1000.

Program to get unix Timestamp

const current_timestamp = new Date().getTime() console.log(current_timestamp); //timestamp from a date function datetoTimestamp(strDate) < var date = Date.parse(strDate); return date/1000; >timestamp = datetoTimestamp('10/19/2021, 4:21:54 ') timestamp_to_milsec = timestamp*1000; console.log('millsecond:',timestamp_to_milsec);

1634659545467 millsecond: 1634617314000

• getDate():Use to get day of calendar month 1 to 31.
• getMonth(): Use to get month number 0 to 11.
• getFullYear(): Use to get year in 4-digits format.
• getHours():Use to get the hour in 24-hour format.
• getMinutes():Use to get the minutes 0 to 59.
• getSeconds() : Use to get seconds 0 to 59.

JavaScript Program to Unix timestamp to DateTime

In this example, we have used getime() method to get the UNIX timestamp in milliseconds and create an object of the date class and use its method to get datetime.

By using the hard code value instead of finding the current timestamp.

//get unixtimestamp usng gettime() method const current_timestamp = new Date().getTime() console.log(current_timestamp); var date = new Date(current_timestamp); console.log("Full date: "+date.getDate()+"/"+(date.getMonth()+1)+ "/"+date.getFullYear()+" "+date.getHours()+ ":"+date.getMinutes()+":"+date.getSeconds()); //by using hard code value of timestamp var millsecond = 1634660514*1000; var date = new Date(millsecond); console.log("Full date: "+date.getDate()+"/"+(date.getMonth()+1)+ "/"+date.getFullYear()+" "+date.getHours()+ ":"+date.getMinutes()+":"+date.getSeconds());

Full date: 19/10/2021 16:17:40 Full date: 19/10/2021 16:21:54

2. toDateString() to Convert timestamp to date in JavaScript

In this example, we are using the todateString() method to get the date from UNIX epoch time/unixtimestamp.

JS Program to convert unix timestamp to date

var millsecond = 1634617314*1000; var date = new Date(millsecond).toDateString(); console.log(date)

3. Convert timestamp to different timezone

To convert Unix timestamp tolocalstring() function is used to convert a date object to a string based on passed argument value convert date to a different timezone.

Synatx

tolocalstring(locales,options)

Parameters

• Locales: The locales is an array of locale strings that is language-specific format based on national geography. In the below example, we have used “en-US”.
• options: It conatins more property that represent comparsion options.

JS Program unix timestamp to different timezone

We can change the locales as per need from the below locales tables.

//get datetime var millsecond = 1634660514*1000; var datetime = new Date(millsecond).toLocaleString("en-US"); console.log('datetime=,datetime) //get date only var date = new Date(millsecond).toLocaleDateString("en-US"); console.log('date=',date) //get time only var time = new Date(millsecond).toLocaleTimeString("en-US"); console.log('time=',time) //by using the second options parameters var datetime = new Date(millsecond); var datestr = datetime.toLocaleString(); console.log(datestr) console.log(datetime.toLocaleString("en-US", )) console.log(datetime.toLocaleString("en-US", )) console.log(datetime.toLocaleString("en-US", )) console.log(datetime.toLocaleString("en-US", ))

dateTime = 10/19/2021, 4:21:54 PM date = 10/19/2021 Time = 4:21:54 PM 10/19/2021, 4:21:54 AM Tuesday, October 19, 2021 Tuesday 10/19/2021, 4:21:54 AM Coordinated Universal Time 04 AM

Tables of locals for different timezone

Summary

In this post, we have learned how to convert Timestamp to DateTime in JavaScript.how to get Timestamp. How to convert timestamps at different timezone.

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Convert a Unix Timestamp to a Date in Vanilla JavaScript

How do you convert a Unix timestamp value into a human-readable date using vanilla JavaScript?

You can convert the Unix timestamp to a date string by following these three steps:

1. Convert the unix timestamp into milliseconds by multiplying it by 1000 .
2. Use the newly created milliseconds value to create a date object with the new Date() constructor method.
3. Use the .toLocaleString() function to convert the date object into human-friendly date strings.

In this article, we’ll walk you through each of those steps.

Table of Contents

Convert the Unix Timestamp to Milliseconds

Since the new Date() function needs to be supplied with a milliseconds value, we need to first convert our given Unix timestamp to milliseconds. We can do this by simply multiplying the Unix timestamp by 1000 .

Unix time is the number of seconds that have elapsed since the Unix epoch, which is the time 00:00:00 UTC on 1 January 1970 . It’s most commonly used to create a running total of seconds when interacting with computers.

Therefore, a Unix timestamp is simply the number of seconds between a specific date and the original Unix Epoch date.

Measuring time using Unix timestamps is particularly useful because it is the same for everyone around the globe at all times since they don’t observe timezones. This can be very useful for dealing with dated information on both the server and client-side of applications.

So, let’s write some code to convert a Unix timestamp to milliseconds:

const unixTimestamp = 1575909015 const milliseconds = unixTimestamp * 1000 // 1575909015000 

Feel free to substitute your own Unix timestamp in the code above.

In the next section, we’ll put to use that milliseconds value we just created.

Create a Date Object Using new Date()

Now that we have a milliseconds value, we can create a new Date() object.

The Date object instance we create will represent a single moment in time and will hold data on the year, month, day, hour, minute, and second for that moment in time.

Let’s add on to the code we already wrote in the last section. To create the Date object, make your code look like this:

const unixTimestamp = 1575909015 const milliseconds = 1575909015 * 1000 // 1575909015000 const dateObject = new Date(milliseconds) 

We use the new Date() constructor and pass to it the milliseconds variable we created in the last section.

As a result, we’re left with a newly created dateObject variable that represents the Date object instance.

We’ll use this in the next section.

Create Human-Friendly Date Strings With .toLocaleString()

Now that we have a Date object to work with, we can start creating some human-friendly date strings.

Using the .toLocaleString() function is one really easy way to do this. The function can be called on a data object and will return a string with a language sensitive representation of the date portion of the given date object.

Here’s what a simple code example looks like (adding on to the code we have written in the past sections):

const unixTimestamp = 1575909015 const milliseconds = 1575909015 * 1000 // 1575909015000 const dateObject = new Date(milliseconds) const humanDateFormat = dateObject.toLocaleString() //2019-12-9 10:30:15 

As you can see, we created a human-friendly date string by calling the .toLocaleString() on the dateObject we created in the last section.

Here are some examples of how you can use the .toLocaleString() to return strings of specific components of the date by passing different arguments to the .toLocaleString() function:

const unixTimestamp = 1575909015 const milliseconds = 1575909015 * 1000 // 1575909015000 const dateObject = new Date(milliseconds) const humanDateFormat = dateObject.toLocaleString() //2019-12-9 10:30:15 dateObject.toLocaleString("en-US", ) // Monday dateObject.toLocaleString("en-US", ) // December dateObject.toLocaleString("en-US", ) // 9 dateObject.toLocaleString("en-US", ) // 2019 dateObject.toLocaleString("en-US", ) // 10 AM dateObject.toLocaleString("en-US", ) // 30 dateObject.toLocaleString("en-US", ) // 15 dateObject.toLocaleString("en-US", ) // 12/9/2019, 10:30:15 AM CST 

The .toLocaleString takes a locales string parameter that alters results based on language and geography. In the example above, we used the «en-US» locale tag. You can learn more about other values you can use instead here.

We also passed an object with some options in it as well. If you want to learn more, there’s some good information about those here.

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Convert Unix Timestamp to Date in JavaScript

This tutorial will explain how we can convert the Unix timestamp to date in JavaScript. Unix timestamp is the time elapsed since the 1, Jan 1970 00:00:00 UTC, represented in seconds.

The JavaScript Date object contains the representation for the time elapsed since the 1, Jan 1970 00:00:00 UTC in milliseconds.

Convert Unix Timestamp to Date in JavaScript

When we create a new object from the Date() class using new Date() , it returns the time in milliseconds when it is created. If we need to get an object from the Date class at a specific point of time, we can pass the epoch timestamp to that class’s constructor.

var timestamp = 1607110465663 var date = new Date(timestamp); console.log(date.getTime()) console.log(date) 

1607110465663 2020-12-04T19:34:25.663Z 

The Date class provides many methods to represent the Date in the preferred format like:

1. getDate() returns the day of the calendar month 1 to 31 at that time.
2. getMonth() returns the month number 0 to 11 at that time.
3. getFullYear() returns the year in 4-digits format.
4. getHours() returns the exact hour in 24-hour format for that time.
5. getMinutes() returns the exact minutes 0 to 59 at that time.
6. getSeconds() returns the exact seconds 0 to 59 at that time.

var timestamp = 1607110465663 var date = new Date(timestamp);  console.log("Date: "+date.getDate()+  "/"+(date.getMonth()+1)+  "/"+date.getFullYear()+  " "+date.getHours()+  ":"+date.getMinutes()+  ":"+date.getSeconds()); 

Since the JavaScript Date timestamp is in the unit of millisecond while the Unix timestamp is in the unit of second, we can multiply 1000 to convert the Unix timestamp to JavaScript timestamp. If the Unix timestamp is 1607110465 , then the JavaScript timestamp is 1607110465000 .

The following example demonstrates how we can convert the Unix timestamp to JavaScript Date timestamp.

var unixTimestamp = 62678980 var date = new Date(unixTimestamp*1000); console.log("Unix Timestamp:",unixTimestamp) console.log("Date Timestamp:",date.getTime()) console.log(date) console.log("Date: "+date.getDate()+  "/"+(date.getMonth()+1)+  "/"+date.getFullYear()+  " "+date.getHours()+  ":"+date.getMinutes()+  ":"+date.getSeconds()); 

Unix Timestamp: 62678980 Date Timestamp: 62678980000 Mon Dec 27 1971 12:49:40 GMT+0200 (Eastern European Standard Time) Date: 27/12/1971 12:49:40 

Related Article — JavaScript Date

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