Javascript timestamp to seconds

How to convert Unix timestamp to time in JavaScript ?

In this article, we will see how to convert UNIX timestamps 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.

dateObj = new Date(unixTimestamp * 1000); utcString = dateObj.toUTCString(); time = utcString.slice(-11, -4);

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Method 2: Getting individual hours, minutes and seconds

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. 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.

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');

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Unix timestamp to seconds in javascript

I’m trying to do a program which executes after 15 minutes of being in the page. My problem is how to get the exact number to add on the timestamp which is stored in a cookie.
I need a function to convert seconds into timestamps or anything that can make the action execute after 15 minutes. I don’t really know how much time is 1792939 which I place in the code below.

setInterval("timer()",1000); $.cookie("tymz", time); function timer() < var d = new Date(); var time = d.getTime(); var x = Number($.cookie("tymz")) + 1792939; //alert('Cookie time: ' + x + '\nTime: ' + time); if(time >x)< alert('times up'); >else < //alert('not yet\n' + 'times up: ' + x + '\ntime: ' + time); >> 

Whats in the cookie? A parseable date string or unix TS? Also, do you want to call that function if the user keeps the page open for 15 minutes or does this have to be persistent (i.e. 5 minutes on page 1 so 10 minutes on page 2)?

4 Answers 4

How about using setTimeout(..)?

unix timestamp are second from epoch (1/1/1970) so if you want to execute some code after 15 minutes just record the time when the page is loaded then every second calculate how many seconds are passed from page load. When the difference between current time and page load time is greater than 15*60*1000 you can execute your code.

var pageLoad = new Date().getTime(); function tick() < var now = new Date().getTime(); if((now - pageLoad) >15*60*1000) executeYourCode(); > setInterval("tick()",1000); 

Remeber that javascript return time in millisecond

If the number is seconds since 1/1/1970 00:00:00, then you can convert ‘1792939’ to a javascript date by multiplying by 1,000 and passing to Date:

var d = new Date(1792939 * 1000) // Thu Jan 22 1970 04:02:19 

Currently it is about 1311428869 seconds since 1/1/1970. So if you have a value for seconds, then you can use setInterval to run a function 15 minutes after that:

var seconds = ?? // set somehow var start = new Date(seconds * 1000); var now = new Date(); var limit = 15 * 60 * 1000; var lag = now - start + limit; // Only set timeout if start was less than 15 minutes ago if ( lag > 0 )

Provided the current time is less than 15 minutes from the start time, the function will run at approximately 15 minutes after the start time. If the system is busy when the time expires, the function should be run as soon as possible afterward (usually within a few ms, but maybe more).

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Mastering the art of converting timestamps to seconds in JavaScript

Learn how to convert timestamps to seconds in JavaScript with our easy-to-follow guide. Get step-by-step instructions, code examples, and best practices for handling timestamps. Optimize your code with our expert tips and improve your skills now!

• Getting the Timestamp in JavaScript
• Converting Unix Timestamps to Time in JavaScript
• Getting the Seconds of a Date Object in JavaScript
• Getting the Current Date/Time in Seconds
• Converting Timestamps to Different Formats
• Using Moment.js to Convert Seconds to hh:mm:ss
• Other Methods for Converting Datetime to Seconds
• Important Points to Consider
• Helpful Points
• Other simple examples of converting timestamps to seconds in JavaScript
• Conclusion
• How do you convert HH MM SS to seconds in JavaScript?
• How to extract time from timestamp JavaScript?
• How do I convert datetime to seconds?
• How to convert timestamp in JavaScript?

Timestamps are an essential part of many applications, especially those that deal with date and time. JavaScript provides several built-in functions and methods to work with timestamps, making it easy to convert them to seconds. In this article, we will explore different ways to convert timestamps to seconds in JavaScript.

Getting the Timestamp in JavaScript

The first step in converting a timestamp to seconds is to get the timestamp in JavaScript. JavaScript provides a built-in Date() class that allows us to work with dates and times easily. We can use the getTime() function to get the date in milliseconds.

const now = new Date(); const timestamp = now.getTime(); 

Once we have the timestamp in milliseconds, we can convert it to seconds by dividing it by 1000.

const seconds = timestamp / 1000; 

Converting Unix Timestamps to Time in JavaScript

Unix timestamps are the number of seconds that have elapsed since January 1, 1970, 00:00:00 UTC. We can convert Unix timestamps to time in JavaScript by multiplying the Unix timestamp by 1000 to convert it to milliseconds and then using the Math.floor() function to round it down to the nearest second.

const unixTimestamp = 1629631269; const date = new Date(unixTimestamp * 1000); const seconds = Math.floor(date.getTime() / 1000); 

Getting the Seconds of a Date Object in JavaScript

We can get the seconds of a date object in JavaScript by using the getSeconds() method.

const now = new Date(); const seconds = now.getSeconds(); 

Getting the Current Date/Time in Seconds

To get the current date/time in seconds, we can use the getTime() method to get the current date/time in milliseconds and then divide it by 1000 to convert it to seconds.

const now = new Date(); const timestamp = now.getTime(); const seconds = timestamp / 1000; 

Converting Timestamps to Different Formats

JavaScript provides several methods to convert timestamps to different formats. We can use the toUTCString() , getHours() , getMinutes() , and toDateString() methods to convert timestamps to different formats.

const now = new Date(); const utcString = now.toUTCString(); const hours = now.getHours(); const minutes = now.getMinutes(); const dateString = now.toDateString(); 

Using Moment.js to Convert Seconds to hh:mm:ss

Moment.js is a popular library for working with dates and times in JavaScript. It provides a simple and easy-to-use API for formatting dates and times. We can use Moment.js to format seconds as hh:mm:ss .

const seconds = 3600; const duration = moment.duration(seconds, "seconds"); const formatted = duration.format("hh:mm:ss"); 

Other Methods for Converting Datetime to Seconds

There are other methods for converting datetime to seconds in javascript. For example, in Python, we can use the total_seconds() method to convert datetime to seconds.

import datetime dt = datetime.datetime.now() seconds = dt.timestamp() 

Important Points to Consider

When working with timestamps in javascript, there are several important points to consider. First, JavaScript works in milliseconds, so we need to divide the timestamp by 1000 to get it in seconds. Second, there are different ways to format time in JavaScript, so we need to choose the appropriate method based on our requirements. Third, we can use the Day.js library for creating date objects from Unix timestamps. Fourth, we need to be aware of rounding and handling leap seconds. Fifth, there are common issues with timestamps in JavaScript, such as the Y2K38 problem. Sixth, we can use cheatsheets for working with dates and timestamps in javascript. Finally, many JavaScript frameworks provide built-in functions for working with dates and timestamps.

Helpful Points

There are several helpful points to consider when working with timestamps in JavaScript. First, we can use the Date.now() function for getting the current timestamp. Second, we can use the toLocaleTimeString() method for a localized time string. Third, we can use the setInterval() function for updating the timestamp dynamically. Fourth, we need to follow best practices for handling timestamps, such as using a standard format and validating user input. Fifth, we need to be aware of issues with timezone conversions, rounding errors, and date formatting. Sixth, there are many other libraries available that replace Moment.js, such as Luxon and Day.js.

Other simple examples of converting timestamps to seconds in JavaScript

In Javascript , for instance, convert timestamp to time javascript code example

let unix_timestamp = 1549312452 // Create a new JavaScript Date object based on the timestamp // multiplied by 1000 so that the argument is in milliseconds, not seconds. var date = new Date(unix_timestamp * 1000); // Hours part from the timestamp var hours = date.getHours(); // Minutes part from the timestamp var minutes = "0" + date.getMinutes(); // Seconds part from the timestamp var seconds = "0" + date.getSeconds();// Will display time in 10:30:23 format var formattedTime = hours + ':' + minutes.substr(-2) + ':' + seconds.substr(-2);console.log(formattedTime); Run code snippetHide results

In Javascript case in point, js unix seconds to date code example

function timeConverter(UNIX_timestamp) < var a = new Date(UNIX_timestamp * 1000); var months = ['Jan','Feb','Mar','Apr','May','Jun','Jul','Aug','Sep','Oct','Nov','Dec']; var year = a.getFullYear(); var month = months[a.getMonth()]; var date = a.getDate(); var hour = a.getHours(); var min = a.getMinutes(); var sec = a.getSeconds(); var time = date + ' ' + month + ' ' + year + ' ' + hour + ':' + min + ':' + sec ; return time; >console.log(timeConverter(0)); Run code snippetHide results

Conclusion

In this article, we have explored different ways to convert timestamps to seconds in JavaScript. We have covered how to get the timestamp in JavaScript, how to convert Unix timestamps to time, how to get the seconds of a date object, how to get the current date/time in seconds, how to convert timestamps to different formats, and how to use Moment.js to format seconds as hh:mm:ss . We have also discussed other methods for converting datetime to seconds, important points to consider when working with timestamps in JavaScript, and helpful points for handling timestamps. By following the best practices and using the appropriate methods and libraries, we can master the art of converting timestamps to seconds in JavaScript.

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How to get the Unix timestamp in JavaScript

The Unix timestamp is an integer value that represents the number of seconds elapsed since the Unix Epoch on January 1st, 1970, at 00:00:00 UTC. In short, a Unix timestamp is the number of seconds between a specific date and the Unix Epoch.

The JavaScript Date object provides several methods to manipulate date and time. You can get the current timestamp by calling the now() function on the Date object like below:

This method returns the current UTC timestamp in milliseconds. The Date.now() function works in almost all modern browsers except IE8 and earlier versions. But you can fix this by writing a small polyfill:

if(!Date.now)  Date.now = () => new Date().getTime() > 

Otherwise, you can get the same timestamp by calling other JavaScript functions that work in older browsers too:

const timestamp = new Date().getTime() // OR const timestamp = new Date().valueOf() 

To convert the timestamp to seconds (Unix time), you can do the following:

const unixTime = Math.floor(Date.now() / 1000) 

The unixTime variable now contains the Unix timestamp for the current date and time, depending on the user’s web browser.

It is recommended to use Date.now() whenever possible, even with polyfill. Unlike the getTime() method, it is shorter and doesn’t create a new instance of the Date object.

If you are using a Unix-compatible machine like Ubuntu or macOS, you can also get the current Unix timestamp by typing the following command in your terminal:

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