How to convert Unix timestamp to time in JavaScript? - GeeksforGeeks

18 Jul, 2019
UNIX timestamps can be converted to time using 2 approaches:
Method 1: Using the toUTCString() method:As JavaScript works in milliseconds, it is necessary to convert the time into milliseconds by multiplying it by 1000 before converting it. This value is then given to the Date() function to create a new Date object.
The toUTCString() method is used to represent the Date object as a string the UTC time format. The time from this date string can be found by extracting from the 11th to last to the 4th to the last character of the string. This is extracted using the slice() function. This string is the time representation of the UNIX timestamp.
Syntax:
dateObj = new Date(unixTimestamp * 1000);utcString = dateObj.toUTCString();time = utcString.slice(-11, -4);
Example:
<!DOCTYPE html><html>  <head>    <title>      How to convert Unix timestamp      to time in JavaScript?  </title></head>  <body>    <h1 style="color: green">      GeeksforGeeks  </h1>    <b>      How to convert Unix       timestamp to time in JavaScript?  </b>    <p>      UNIX Timestamp is: 10637282  </p>    <p>Time is: <span class="output">      </span>  </p>      <button onclick="convertTimestamptoTime()">      Get time from timestamp  </button>    <script type="text/javascript">        function convertTimestamptoTime() {            unixTimestamp = 10637282;              // convert to milliseconds and             // then create a new Date object            dateObj = new Date(unixTimestamp * 1000);            utcString = dateObj.toUTCString();              time = utcString.slice(-11, -4);              document.querySelector(              '.output').textContent = time;        }    </script></body>  </html>
Output:
Before clicking the button:
After clicking the button:
Method 2: Getting individual hours, minutes and secondsAs JavaScript works in milliseconds, it is necessary to convert the time into milliseconds by multiplying it by 1000 before converting it. This value is then given to the Date() function to create a new Date object.
Each part of the time is extracted from the Date object. The hour’s value in UTC is extracted from the date using the getUTCHours() method. The minute’s value in UTC is extracted from the date using the getUTCMinutes() method. The second’s value in UTC is extracted from the date using the getUTCSeconds() method.
The final formatted date is created by converting each of these values to a string using the toString() method and then padding them with an extra ‘0’, if the value is a single-digit by using the padStart() method. The individual parts are then joined together with a colon(:) as the separator. This string is the time representation of the UNIX timestamp.
Syntax:
dateObj = new Date(unixTimestamp * 1000); // Get hours from the timestamphours = dateObj.getUTCHours(); // Get minutes part from the timestampminutes = dateObj.getUTCMinutes(); // Get seconds part from the timestampseconds = dateObj.getUTCSeconds(); formattedTime = hours.toString().padStart(2, '0') + ':' +                 minutes.toString().padStart(2, '0') + ':' +                 seconds.toString().padStart(2, '0');
Example:
<!DOCTYPE html><html>  <head>    <title>      How to convert Unix timestamp       to time in JavaScript?  </title></head>  <body>    <h1 style="color: green">      GeeksforGeeks  </h1>    <b>      How to convert Unix timestamp      to time in JavaScript?  </b>    <p>UNIX Timestamp is: 10637282</p>    <p>Time is: <span class="output">      </span>  </p>      <button onclick="convertTimestamptoTime()">      Get time from timestamp  </button>    <script type="text/javascript">        function convertTimestamptoTime() {            unixTimestamp = 10637282;              // convert to milliseconds            // and then create a new Date object            dateObj = new Date(unixTimestamp * 1000);              // Get hours from the timestamp            hours = dateObj.getUTCHours();              // Get minutes part from the timestamp            minutes = dateObj.getUTCMinutes();              // Get seconds part from the timestamp            seconds = dateObj.getUTCSeconds();              formattedTime = hours.toString().padStart(2, '0') + ':' +                minutes.toString().padStart(2, '0') + ':' +                seconds.toString().padStart(2, '0');              document.querySelector('.output').textContent = formattedTime;        }    </script></body>  </html>
Output:
Before clicking the button:
After clicking the button:
JavaScript-Misc
Picked
JavaScript
Web Technologies
Writing code in comment?
Please use ide.geeksforgeeks.org,
generate link and share the link here.
Comments
Old Comments
Convert a string to an integer in JavaScript
Differences between Functional Components and Class Components in React
Difference between var, let and const keywords in JavaScript
How to append HTML code to a div using JavaScript ?
How to Open URL in New Tab using JavaScript ?
Roadmap to Become a Web Developer in 2022
Installation of Node.js on Linux
Top 10 Projects For Beginners To Practice HTML and CSS Skills
How to fetch data from an API in ReactJS ?
How to insert spaces/tabs in text using HTML/CSS?