javascript - Get ISO string from a date without time zone - Stack Overflow

admin管理员组

文章数量:1135124

My configuration is Lisbon time zone. When I do new Date() I get my current local date/time which is Fri Apr 28 2017 01:10:55 GMT+0100 (GMT Daylight Time)

When I get the ISO string with toISOString() it will apply the time zone and I will get:

2017-04-28T00:10:55.964Z

The problem is that some minutes ago the date time was like this (yesterday):

2017-04-27T23:45:05.654Z

I tried moment.js (new to this) and I did something like this

document.write(moment('2017-04-28').format())

But I get this 2017-04-28T00:00:00+01:00 which is not 2017-04-28T00:00:00.000Z

I want to pass this value as a parameter of a restful method to parse it automatically as a DateTime type, but if I pass the output from moment.js format then it will get parsed as 2017-04-27 23:00:00.00

If I create a new date with new Date() or with new Date('2017-04-27') (date portion), I just want to get the ISO format like as follows with no time zone:

2017-04-28T00:00:00.000Z

Is there a javascript method like toISOString() or using maybe moment to get that format?

No matter what time zone or moment of day, I just to simulate that is midnight of the date given.

My configuration is Lisbon time zone. When I do new Date() I get my current local date/time which is Fri Apr 28 2017 01:10:55 GMT+0100 (GMT Daylight Time)

When I get the ISO string with toISOString() it will apply the time zone and I will get:

2017-04-28T00:10:55.964Z

The problem is that some minutes ago the date time was like this (yesterday):

2017-04-27T23:45:05.654Z

I tried moment.js (new to this) and I did something like this

document.write(moment('2017-04-28').format())

But I get this 2017-04-28T00:00:00+01:00 which is not 2017-04-28T00:00:00.000Z

I want to pass this value as a parameter of a restful method to parse it automatically as a DateTime type, but if I pass the output from moment.js format then it will get parsed as 2017-04-27 23:00:00.00

If I create a new date with new Date() or with new Date('2017-04-27') (date portion), I just want to get the ISO format like as follows with no time zone:

2017-04-28T00:00:00.000Z

Is there a javascript method like toISOString() or using maybe moment to get that format?

No matter what time zone or moment of day, I just to simulate that is midnight of the date given.

• javascript
• date
• datetime
• momentjs

Share Improve this question Follow edited Aug 30, 2020 at 5:10 Be Kind 5,15211 gold badge4141 silver badges4747 bronze badges asked Apr 28, 2017 at 0:31 Maximus DecimusMaximus Decimus 5,2612323 gold badges7070 silver badges9898 bronze badges 1

• 2 A date/time value with no timezone is (usually) not useful, unless the time zone is assumed to be something in particular (like UTC). Is that what you want? – Pointy Commented Apr 28, 2017 at 0:41

Add a comment  | 

17 Answers 17

Sorted by: Reset to default 38

It's very unclear what you're asking. If you want the UTC date with the hours always 0, then set the UTC hours to 0 and use toISOString, e.g.

var d = new Date();
d.setUTCHours(0,0,0,0);
console.log(d.toISOString());

Of course this is going to show the UTC date, which may be different to the date on the system that generated the Date.

Also,

new Date('2017-04-27').toISOString();

should return 2017-04-27T00:00:00Z (i.e. it should be parsed as UTC according to ECMA-262, which is contrary to ISO 8601 which would treat it as local), however that is not reliable in all implementations in use.

If you just want to get the current date in ISO 8601 format, you can do:

if (!Date.prototype.toISODate) {
  Date.prototype.toISODate = function() {
    return this.getFullYear() + '-' +
           ('0'+ (this.getMonth()+1)).slice(-2) + '-' +
           ('0'+ this.getDate()).slice(-2);
  }
}

console.log(new Date().toISODate());

However, since the built-in toISOString uses UTC this might be confusing. If the UTC date is required, then:

if (!Date.prototype.toUTCDate) {
  Date.prototype.toUTCDate = function() {
    return this.getUTCFullYear() + '-' +
           ('0'+ (this.getUTCMonth()+1)).slice(-2) + '-' +
           ('0'+ this.getUTCDate()).slice(-2);
  }
}

console.log(new Date().toUTCDate());

old_date = Fri Jan 08 2021 16:01:30 GMT+0900

const new_date = old_date.toISOString().substring(0, 10);

new_date = "2021-01-08"

You can achieve this by simply formating everything that you need in place using moment.format() and then simply append the extra Z to the string. You have to do this as Z within moment JS is reserved for outputting.

var date = moment('2014-08-28').format("YYYY-MM-DDT00:00:00.000") + "Z";

Fiddle example https://jsfiddle.net/2avxxz6q/

you can try this, it works for me! you will have the ISO format without timeZone effect

Fri Jan 01 2021 23:10:00 GMT+0100 => 2021-01-01T23:10:00.000Z

function isoDateWithoutTimeZone(date) {
  if (date == null) return date;
  var timestamp = date.getTime() - date.getTimezoneOffset() * 60000;
  var correctDate = new Date(timestamp);
  // correctDate.setUTCHours(0, 0, 0, 0); // uncomment this if you want to remove the time
  return correctDate.toISOString();
}


        var now= new Date("01-01-2021 23:10:00");
        console.log(now.toString());
        var returnedDate = isoDateWithoutTimeZone(now);
        console.log(returnedDate);

There is another tricky way you can use it, AFAIK from this answer. In Swedish date format you can convert your date easily to Iso format like below:

console.log(
  new Intl.DateTimeFormat('sv-SE').format(new Date())
)

You don't need moment.js library, you can just parse and connect date components. For example

type Components = {
  day: number,
  month: number,
  year: number
}

export default class DateFormatter {
  // 2018-11-11T00:00:00
  static ISOStringWithoutTimeZone = (date: Date): string => {
    const components = DateFormatter.format(DateFormatter.components(date))
    return `${components.year}-${components.month}-${components.day}T00:00:00`
  }

  static format = (components: Components) => {
    return {
      day: `${components.day}`.padStart(2, '0'),
      month: `${components.month}`.padStart(2, '0'),
      year: components.year
    }
  }

  static components = (date: Date): Components => {
    return {
      day: date.getDate(),
      month: date.getMonth() + 1,
      year: date.getFullYear()
    }
  }
}

I wrote a simple function that extends moment js objects:

moment.fn.toISOStringWithoutTimezone = function () {
  return this.format("YYYY-MM-DD[T]HH:mm:ss");
};

It can be used like

moment().toISOStringWithoutTimezone();

My issue: I need to send the date and time into ISO format to the server API all the time. To solve this issue, I could have simple used the new Date().toISOString() but my client app could be running under different time zone hence there would be time zone difference all the time.

Solution: To solve this issue, I referred the solution given above i.e. manually create the ISO format string regardless given time zone.

function getISOString(date)
{
let d = new Date(date),
month = '' + (d.getMonth() + 1),
day = '' + d.getDate(),
year = ''+ d.getFullYear(),
hours = ''+d.getHours(),
minutes = ''+d.getMinutes(),
seconds = ''+d.getSeconds();
month = month.length < 2? '0' + month : month;
day   = day.length < 2? '0' + day : day;
hours = hours.length < 2?'0'+hours:hours;
minutes = minutes.length< 2? '0'+minutes:minutes;
seconds = seconds.length< 2? '0'+seconds:seconds;
return ( [year, month, day].join('-')+'T'+[hours,minutes,seconds].join(':')+'.000');
}
console.log(getISOString(new Date()));

You can use https://momentjs.com/docs/#/displaying/as-iso-string/

moment().toISOString(keepOffset);

From my understanding you want ISOString of start of the date irrespective of time

(ie) Time zone should be'T00:00:00.000Z' more matter what date you choose.

I dont think there is a straight function without using any plugin.

So i created a function to fullfill your need,If this is what you are looking for

function mimicISOString(date) {
    let d = new Date(date),
        month = '' + (d.getMonth() + 1),
        day = '' + d.getDate(),
        year = d.getFullYear();

    if (month.length < 2) 
        month = '0' + month;
    if (day.length < 2) 
        day = '0' + day;

    return [year, month, day].join('-') +'T00:00:00.000Z';
}

console.log(mimicISOString(new Date()));

This will return current date with start of the time zone.If this is what you are looking for

Date formatting is not a main problem.
The whole question is based on a relatively wrong premise.

For a start it is necessary to realize what could be a Date.

First alternative is: "What time I see on my watches"
That is "relative date" because I see 11:00 at Europe at different time that somebody sees 11:00 at US

Second alternative is: "Point to specific moment in time"
That could be named "absolute date" and most important for this view is unix timestamp. The timestamp is ticking synchronously at whole world, although different people see different time at their watches.

So, 2017-04-28T00:10:55.964Z is equal to timestamp 1493338255 (btw Z in date string means: this is time at GMT). The same timestamp has 2017-04-28T01:10:55.964+01:00, 2017-04-28T09:10:55.964+09:00, 2017-04-27T16:10:55.964-08:00, etc.

That means: ISODateString says what time I see at my watches and how far away I am from Greenwich

And now implementation.
It is really important to say what do you need.

Let's have a set of hourly events.

Now guy from US coming and asking: "what happened yesterday?"
What should be at response?

There are 2 possibilities again:

1. What happened during his day 2017-04-28T00:00:00-08:00 ... 2017-04-28T23:59:59-08:00
   It means 2017-04-28T08:00:00Z .. 2017-04-29T07:59:59Z and it is correct, because this is an actual day range of US people's

2. What happened during calendar day 2017-04-28
   You can want some globally statistic and it is required to see the same at US as well as Japan.
   Solution is really simple - just drop time-shift -08:00 from question.
   moment('2017-04-28').format(YYYY-MM-DDTHH:mm:ss) should make something like this:
   2017-04-28T00:00:00 ... 2017-04-28T23:59:59

Just be careful, that is NOT an ISODateTime and you have to handle it right at the API!

I suppose you wish to get the current date in ISO 8601 to pass it to your API? Maybe using a moment.js wrapper for native JavaScript mentioned here might help?

As in your example:

document.write(moment('01/12/2016', 'DD/MM/YYYY', true).toISOString());

Snippet:

$(function(){
  var displaysTime = $('#divTime');
  displaysTime.text(moment.utc('27/04/2017', 'DD/MM/YYYY', true).toISOString());
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.5.1/moment.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.0/jquery.min.js"></script>

<div id="divTime">
</div>

If you want the Date to be in UTC time (00:00:00) you can use:

moment.utc('2017-04-28').toISOString() // 2017-04-28T00:00:00.000Z

Here's two solutions for you....

Initially, I wrote a small piece of JavaScript (okay, okay, Typescript) which took a Date value and converted it into an ISO date string, like this:

createDateString(dateStr) {     
  //  Take a Date value, and turn it into a "2005-05-26T11:37:42" string
  var tzoffset = (new Date()).getTimezoneOffset() * 60000; //offset in milliseconds
  var currentDate = new Date(dateStr);
  var withTimezone = new Date(currentDate.getTime() - tzoffset);
  var localISOTime = withTimezone.toISOString().slice(0, 19).replace('Z', '');
  return localISOTime;
}

This worked perfectly... until it was deployed onto a server. Then, I noticed that it was getting the timezone wrong.

My solution (without resorting to third-party products) was to rewrite it like this:

padZero(numericValue) {
  if (numericValue < 10)
      return '0' + numericValue.toString();;
     
  return numericValue.toString();;
}
createDateString(date) {     
  //  Take a Date value, and turn it into a "2005-05-26T11:37:42" string
  var dateStr = date.getFullYear() + '-' + 
        this.padZero(date.getMonth()+1) + '-' +
        this.padZero(date.getDate()) + 'T' +
        this.padZero(date.getHours()) + ':' + 
        this.padZero(date.getMinutes()) + ':' + 
        this.padZero(date.getSeconds());

  return dateStr;
}

new Date('2019-04-27').toISOString();

also you can use dayjs: https://day.js.org/

moment('2017-04-28').utcOffset(0, true).toISOString()

I believe you are saying you'd like to get the current date in Lisbon:

moment().tz("Europe/Lisbon").format('YYYY-MM-DD')

You can see that this works the way you think it should:

moment('2017-04-28T00:00:00+01:00').tz("Europe/Lisbon").format('YYYY-MM-DD') //"2017-04-28"

本文标签： javascriptGet ISO string from a date without time zoneStack Overflow