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.jsRun 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
- 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 :
| S.No | Moment Function | Result |
|---|---|---|
| 1 | moment() | 2017-08-31T06:53:16.470Z |
| 2 | moment().unix() | 1504162446 |
| 3 | moment().format('MMMM Do YYYY, h:mm:ss a') | August 31st 2017, 11:57:57 am |
| 4 | moment().format('D') | 31 |
| 5 | moment().format('dddd') | Thursday |
| 6 | moment().format("MMM Do YY") | Aug 31st 17 |
| 7 | moment().format() | 2017-08-31T12:01:51+05:30 |
| 8 | moment("20131231", "YYYYMMDD").fromNow() | 4 years ago |
| 9 | moment("20200722", "YYYYMMDD").fromNow() | in 3 years |
| 10 | moment().startOf('day').fromNow() | 12 hours ago |
| 11 | moment().endOf('day').fromNow() | in 12 hours |
| 12 | moment().startOf('hour').fromNow() | 16 minutes ago |
| 13 | moment().subtract(10, 'days').calendar() | 08/21/2017 |
| 14 | moment().calendar() | Today at 12:16 PM |
| 15 | moment().add(1, 'days').calendar() | Tomorrow at 12:16 PM |
| 16 | moment.locale() | en |
| 17 | moment().format('LT') | 12:17 PM |
| 18 | moment().format('LTS') | 12:17:52 PM |
| 19 | moment().format('L') | 08/31/2017 |
| 20 | moment().format('l') | 8/31/2017 |
| 21 | moment().format('LL') | August 31, 2017 |
| 22 | moment().format('ll') | Aug 31, 2017 |
| 23 | moment().format('LLL') | August 31, 2017 12:19 PM |
| 24 | moment().format('lll') | Aug 31, 2017 12:20 PM |
| 25 | moment().format('LLLL') | Thursday, August 31, 2017 12:20 PM |
| 26 | moment().format('llll') | Thu, Aug 31, 2017 12:20 PM |
