Timestamp to DateTime in JavaScript

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 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 millsecond by mutiply 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);

Output

1634659545467
millsecond: 1634617314000

1. Convert Timestamp to DateTime in JavaScript


Now we have got the UNIX timestamp in milliseconds the next step is to convert it to date and time. In the below example we get the datetime form by using date class methods

The date class methods help us get the date in different formats as per need.

  • 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());

Output

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)

Output

Tue Oct 19 2021

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", {dateStyle: "full"}))
console.log(datetime.toLocaleString("en-US", {weekday: "long"}))
console.log(datetime.toLocaleString("en-US", {timeZoneName: "long"}))
console.log(datetime.toLocaleString("en-US", {hour: "2-digit"}))

Output

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

ar-SA :Arabic (Saudi Arabia)
bn-BD: Bangla (Bangladesh)
bn-IN: Bangla (India)
cs-CZ : Czech (Czech Republic)
da-DK: Danish (Denmark)
de-AT: Austrian German
de-CH: “Swiss” German
de-DE: Standard German (as spoken in Germany)
el-GR: Modern Greek
en-AU: Australian English
en-CA: Canadian English
en-GB: British English
en-IE: Irish English
en-IN: Indian English
en-NZ: New Zealand English
en-US: US English
en-ZA: English (South Africa)
es-AR: Argentine Spanish
es-CL: Chilean Spanish
es-CO: Colombian Spanish
es-ES: Castilian Spanish (as spoken in Central-Northern Spain)
es-MX: Mexican Spanish
es-US: American Spanish
fi-FI: Finnish (Finland)
fr-BE: Belgian French
fr-CA: Canadian French
fr-CH: “Swiss” French

fr-FR: Standard French (especially in France)
he-IL: Hebrew (Israel)
hi-IN: Hindi (India)
hu-HU:Hungarian (Hungary)
id-ID : Indonesian (Indonesia)
it-CH: “Swiss” Italian
it-IT: Standard Italian (as spoken in Italy)
ja-JP: Japanese (Japan)
ko-KR :Korean (Republic of Korea)
nl-BE: Belgian Dutch
nl-NL: Standard Dutch (as spoken in The Netherlands)
no-NO: Norwegian (Norway)
pl-PL: Polish (Poland)
pt-BR: Brazilian Portuguese
pt-PT: European Portuguese (as written and spoken in Portugal)
ro-RO : Romanian (Romania)
ru-RU: Russian (Russian Federation)
sk-SK :Slovak (Slovakia)
sv-SE: Swedish (Sweden)
ta-IN: Indian Tamil
ta-LK: Sri Lankan Tamil
th-TH: Thai (Thailand)
tr-TR: Turkish (Turkey)
zh-CN: “Mainland China, simplified characters
zh-HK: Hong Kong, traditional characters
zh-TW : Taiwan, traditional characters

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.