javascript - Momentjs how to get next month last date - Stack Overflow

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i am trying to get the last date of the next month, for some reason momentjs returns the wrong date

For Example :

console.log(moment('02/28/2018', "MM/DD/YYYY").add(i, 'M'));

returns :

moment("2018-03-28T00:00:00.000")

where the right date should be :

moment("2018-03-31T00:00:00.000")

i am trying to get the last date of the next month, for some reason momentjs returns the wrong date

For Example :

console.log(moment('02/28/2018', "MM/DD/YYYY").add(i, 'M'));

returns :

moment("2018-03-28T00:00:00.000")

where the right date should be :

moment("2018-03-31T00:00:00.000")

• javascript
• date
• momentjs

Share Improve this question Follow asked Mar 6, 2018 at 2:51 publicArt33publicArt33 31599 silver badges1616 bronze badges 4

• 2 a) get todays date. b) set date to 1. c) add 2 months ... d) subtract 1 day – Jaromanda X Commented Mar 6, 2018 at 2:52
• 1 adding 1 month to the 'n'th day of 'm' will result in the 'n'th day of 'm+1' - so, how is that wrong? – Jaromanda X Commented Mar 6, 2018 at 2:53
• @JaromandaX—you don't need to set the date first, month and date can be in one go, e.g. in POJS you can do: var d = new Date(2017,11,31); d.setMonth(d.getMonth() + 2, 0); returns 31 Jan. Adding 2 months doesn't roll over an extra month by adding the months first then the date, both month and date are set at the same time. ;-) – RobG Commented Mar 6, 2018 at 3:34
• I never knew that about setMonth! learn something every day – Jaromanda X Commented Mar 6, 2018 at 4:52

Add a ment  | 

3 Answers 3

Sorted by: Reset to default 7

Using .add() you are just adding a month to your actual date but you want also go to last day of this month, and for this you can use .endOf():

moment('02/28/2018', "MM/DD/YYYY").add(1, 'M').endOf("month")
// 2018-03-31T23:59:59.999Z

You are adding 1 month to 2/28, so you get 3/28. It only increases the month part.

To get the last day of the month, you can use:

// Should be 12/31/2018 23:59:59
console.log(moment("2018-12-01").endOf("month").toString());

// Should be last day, hour, minute, and second of the current month
console.log(moment().endOf("month").toString());

<script src="https://cdnjs.cloudflare./ajax/libs/moment.js/2.21.0/moment.min.js"></script>

Another variation of guijob's answer, if you want to get based on current day you can use

moment().add(1, "month").endOf("month")

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