如何将 ISO 日期转换为日期格式 yyyy-mm-dd？

Question

How can I get a date having the format yyyy-mm-dd from an ISO 8601 date?

My 8601 date is

2013-03-10T02:00:00Z

How can I get the following?

2013-03-10

Answer 1

Just crop the string:

var date = new Date("2013-03-10T02:00:00Z");
date.toISOString().substring(0, 10);

Or if you need only date out of string.

var strDate = "2013-03-10T02:00:00Z";
strDate.substring(0, 10);

Answer 2

Try this

date = new Date('2013-03-10T02:00:00Z');
date.getFullYear()+'-' + (date.getMonth()+1) + '-'+date.getDate();//prints expected format.

Update:-

As pointed out in comments, I am updating the answer to print leading zeros for date and month if needed.

 date = new Date('2013-08-03T02:00:00Z'); year = date.getFullYear(); month = date.getMonth()+1; dt = date.getDate(); if (dt < 10) { dt = '0' + dt; } if (month < 10) { month = '0' + month; } console.log(year+'-' + month + '-'+dt);

Answer 3

You could checkout Moment.js , Luxon , date-fns or Day.js for nice date manipulation.

Or just extract the first part of your ISO string, it already contains what you want. Here is an example by splitting on the T :

"2013-03-10T02:00:00Z".split("T")[0] // "2013-03-10"

And another example by extracting the 10 first characters:

"2013-03-10T02:00:00Z".substr(0, 10) // "2013-03-10"

Answer 4

This is what I do to get date only:

 let isoDate = "2013-03-10T02:00:00Z"; alert(isoDate.split("T")[0]);

Answer 5

 let isoDate = "2013-03-10T02:00:00Z"; var d = new Date(isoDate); d.toLocaleDateString('en-GB'); // dd/mm/yyyy d.toLocaleDateString('en-US'); // mm/dd/yyyy

Answer 6

Moment.js will handle date formatting for you. Here is how to include it via a JavaScript tag, and then an example of how to use Moment.js to format a date.

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.14.1/moment.min.js"></script>

moment("2013-03-10T02:00:00Z").format("YYYY-MM-DD") // "2013-03-10"

Answer 7

Moment.js is pretty big library to use for a single use case. I recommend using date-fns instead. It offers basically the most functionality of Moment.js with a much smaller bundle size and many formatting options .

import format from 'date-fns/format'
format('2013-03-10T02:00:00Z', 'YYYY-MM-DD'); // 2013-03-10, YYYY-MM-dd for 2.x

One thing to note is that, since it's the ISO 8601 time format, the browser generally converts from UTC time to local timezone. Though this is simple use case where you can probably do '2013-03-10T02:00:00Z'.substring(0, 10); .

For more complex conversions date-fns is the way to go.

Answer 8

Using toLocaleDateString with the Canadian locale returns a date in ISO format.

function getISODate(date) {
    return date.toLocaleDateString('en-ca');
}
getISODate(new Date()); // '2022-03-24'

Answer 9

To all who are using split, slice and other string-based attempts to obtain the date, you might set yourself up for timezone related fails!

An ISO-String has Zulu-Timezone and a date according to this timezone, which means, it might use a date a day prior or later to the actual timezone, which you have to take into account in your transformation chain.

See this example:

const timeZoneRelatedDate = new Date(2020, 0, 14, 0, 0);

console.log(timeZoneRelatedDate.toLocaleDateString(
    'ja-JP', 
    {
      year: 'numeric',
      month: '2-digit',
      day: '2-digit'
    }
).replace(/\//gi,'-'));

// RESULT: "2020-01-14"

console.log(timeZoneRelatedDate.toISOString());

// RESULT: "2020-01-13T23:00:00.000Z" (for me in UTC+1)

console.log(timeZoneRelatedDate.toISOString().slice(0,10));

// RESULT: "2020-01-13"

Answer 10

利用：

new Date().toISOString().substring(0, 10);

Answer 11

Pass your date in the date object:

var d = new Date('2013-03-10T02:00:00Z');
d.toLocaleDateString().replace(/\//g, '-');

Answer 12

This will output the date in YYYY-MM-DD format:

let date = new Date();
date = date.toISOString().slice(0,10);

Answer 13

If you have a date object:

 let date = new Date() let result = date.toISOString().split`T`[0] console.log(result)

or

 let date = new Date() let result = date.toISOString().slice(0, 10) console.log(result)

Answer 14

The best way to format is by using toLocaleDateString with options

    const options = {year: 'numeric', month: 'numeric', day: 'numeric' };
    const date = new Date('2013-03-10T02:00:00Z').toLocaleDateString('en-EN', options)

Check Date section for date options here https://www.w3schools.com/jsref/jsref_tolocalestring.asp

Answer 15

To extend on rk rk 's solution : In case you want the format to include the time, you can add the toTimeString() to your string, and then strip the GMT part, as follows:

var d = new Date('2013-03-10T02:00:00Z');
var fd = d.toLocaleDateString() + ' ' + d.toTimeString().substring(0, d.toTimeString().indexOf("GMT"));

Answer 16

A better version of answer by @Hozefa .

If you have date-fns installed, you could use formatISO function

const date = new Date(2019, 0, 2)
import { formatISO } from 'date-fns'
formatISO(date, { representation: 'date' }) // '2019-01-02' string

Answer 17

If you have the timezone you can do:

const myDate = "2022-10-09T18:30:00.000Z"
const requestTimezone = "Asia/Calcutta";

const newDate = new Date(myDate).toLocaleString("en-CA", {
  dateStyle: "short",
  timeZone: requestTimezone,
});

console.log(newDate)
>> 2022-10-10 

Another outputs:

const myDate = "2022-10-02T21:00:00.000Z"
const requestTimezone = "Asia/Jerusalem";
>> 2022-10-03 

const myDate = "2022-09-28T04:00:00.000Z"
const requestTimezone = "America/New_York";
>> 2022-09-28

Answer 18

let dt = new Date('2013-03-10T02:00:00Z');
let dd = dt.getDate();
let mm = dt.getMonth() + 1;
let yyyy = dt.getFullYear();

if (dd<10) {
    dd = '0' + dd;
}
if (mm<10) {
    mm = '0' + mm;
}
return yyyy + '-' + mm + '-' + dd;

Answer 19

I used this:

HTMLDatetoIsoDate(htmlDate){
  let year = Number(htmlDate.toString().substring(0, 4))
  let month = Number(htmlDate.toString().substring(5, 7))
  let day = Number(htmlDate.toString().substring(8, 10))
  return new Date(year, month - 1, day)
}

isoDateToHtmlDate(isoDate){
  let date = new Date(isoDate);
  let dtString = ''
  let monthString = ''
  if (date.getDate() < 10) {
    dtString = '0' + date.getDate();
  } else {
    dtString = String(date.getDate())
  }
  if (date.getMonth()+1 < 10) {
    monthString = '0' + Number(date.getMonth()+1);
  } else {
    monthString = String(date.getMonth()+1);
  }
  return date.getFullYear()+'-' + monthString + '-'+dtString
}

Source: http://gooplus.fr/en/2017/07/13/angular2-typescript-isodate-to-html-date/

Answer 20

 var d = new Date("Wed Mar 25 2015 05:30:00 GMT+0530 (India Standard Time)"); alert(d.toLocaleDateString());

Answer 21

Many of these answers give potentially misleading output if one is looking for the day in the current timezone.

This function will output the day corresponding with the date's timezone offset:

const adjustDateToLocalTimeZoneDayString = (date?: Date) => {
    if (!date) {
        return undefined;
    }
    const dateCopy = new Date(date);
    dateCopy.setTime(dateCopy.getTime() - dateCopy.getTimezoneOffset()*60*1000);
    return dateCopy.toISOString().split('T')[0];
};

Tests:

it('return correct day even if timezone is included', () => {
    // assuming the test is running in EDT timezone
    // 11:34pm eastern time would be the next day in GMT
    let result = adjustDateToLocalTimeZoneDayString(new Date('Wed Apr 06 2022 23:34:17 GMT-0400'));
    // Note: This is probably what a person wants, the date in the current timezone
    expect(result).toEqual('2022-04-06');

    // 11:34pm zulu time should be the same
    result = adjustDateToLocalTimeZoneDayString(new Date('Wed Apr 06 2022 23:34:17 GMT-0000'));
    expect(result).toEqual('2022-04-06');

    result = adjustDateToLocalTimeZoneDayString(undefined);
    expect(result).toBeUndefined();
});

Misleading approach:

To demonstrate the issue with the other answers' direct ISOString().split() approach, note how the output below differs from what one might expect:

it('demonstrates how the simple ISOString().split() may be misleading', () => {
    // Note this is the 7th 
    expect(new Date('Wed Apr 06 2022 23:34:17 GMT-0400').toISOString().split('T')[0]).toEqual('2022-04-07');
});

Answer 22

Simpler way to get Year Or Month

let isoDateTime = "2013-03-10T02:00:00Z";
console.log(isoDateTime.split("T")[0]); //2013-03-10

Using Split Method

console.log(isoDateTime.split("-")[0]); //2013
console.log(isoDateTime.split("-")[1]); //03

Answer 23

WARNING: Most of these answers are wrong.

That is because toISOString() always returns the UTC date, not local date. So, for example, if your UTC time is 0500 and your timezone is GMT-0800 , the day returned by toISOString() will be the UTC day, which will be one day ahead of the local timezone day.

You need to first convert the date to the local date.

const date = new Date();
date.setTime(date.getTime() - date.getTimezoneOffset()*60*1000)

Now date.toISOString() will always return the proper date according to the local timezone.

But wait, there's more. If we are also using toTimeString() that will now be wrong because time is now local and toTimeString() assumes it is UTC and converts it. So we need to first extract toTimeString() as a variable before doing the conversion.

The Date() class in javascript is inconsistent because of this and should really be updated to avoid this confusion. The toISOString() and toTimeString() methods should both do the same default things with respect to timezone.

Answer 24

Use the below code. It is useful for you.

let currentDate = new Date()
currentDate.toISOString()