Calculating the difference between two dates in JavaScript is relatively straightforward, provided you choose the right Date methods to work with.

Whichever way you get there, the potential applications on date differences are many, from counting down to a particular event, counting up from a past date, to dynamically indicating what's new on your page. For the scripts that follow, the above is our hero people, not some Hollywood actor.

Its superpower is not so much its long term memory, as impressive as that may be, but its knack for converting a date to a number in milliseconds, but nevertheless. And we all know the easiest subjects to perform arithmetic on are numbers.

How do i find the difference between two dates using Javascript - Stack Overflow

So here's the general premise for calculating the difference between two dates- convert both dates to a number using Date. To a few examples now. Notice how the year for "Christmas" is dynamically set to the current year or nextyear if Christmas usd jpy fx rates already passed for this yearso the script is reusable now and in the future as well without having to modify it.

We all remember the Millennium and perhaps even the parties we attended. Calculate difference in days between two dates javascript following shows how many days has elapsed since then count up:. Finally, how about displaying a "new" image alongside new content that will automatically disappear the image, that is after the specified future date has been reached? The logic is calculate difference in days between two dates javascript enough- if the current date is less than the specified future date, write out the "new" image:.

html - How to calculate the number of days between two dates using JavaScript? - Stack Overflow

As you can see, it's not difficult at all to do arithmetic on dates in JavaScript, and in the process, derive a whole bunch of useful applications out of it. The value is memorized on the first function call and ignored otherwise because Disqus allows only one instance per page at the time.

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Home JavaScript Tutorials Calculating the difference between two dates. Calculating the difference between two dates Calculating the difference between two dates in JavaScript is relatively straightforward, provided you choose the right Date methods to work with. Lets begin this tutorial by getting to the heart of it: Copyright c JavaScript Kit.