Node.js calculate datetime difference in hours minutes and seconds moment.js

In this Node.js tutorial, I will tell you how to calculate datetime difference in days, hours, minutes and seconds using moment.js with example.

You can use moment in browser and in Node.js to calculate date difference.

Install Moment in Node.js

Run the npm command to install dependencies of Moment.js

npm install moment --save

Now require this package :

var moment = require("moment");

Calculate datetime difference in days

functioncalculateDays(startDate,endDate)
{
var start_date =moment(startDate,'YYYY-MM-DD HH:mm:ss');
var end_date =moment(endDate,'YYYY-MM-DD HH:mm:ss');
var duration = moment.duration(end_date.diff(start_date));
var days = duration.asDays();
return days;
}

function calculateDays(startDate,endDate)
{
   var start_date = moment(startDate, 'YYYY-MM-DD HH:mm:ss');
   var end_date = moment(endDate, 'YYYY-MM-DD HH:mm:ss');
   var duration = moment.duration(end_date.diff(start_date));
   var days = duration.asDays();       
   return days;
}

Above function will return the number of days between two given dates.

Moment have various function that return the number of weeks (0 – 4), number of hours (0 – 23), number of minutes (0 – 59), number of months (0 – 11) etc.

moment.duration().asDays(); // get the length of the duration in days
moment.duration().asHours(); // get the length of the duration in hours
moment.duration().asWeeks(); // get the length of the duration in weeks
moment.duration().asMonths(); // get the length of the duration in months
moment.duration().asYears(); // get the length of the duration in years

If you have any subscription and you want to know the remaining days from current day :

moment(subs_ends_at).diff(new Date(),'days');

subs_ends_at variable hold the expiry date.

A complete list of moment functions are given below :