I have this string date and I want to use it in a date type for querying in sequelize.
let date = "2019-08-08T12:53:56.811Z"
let startDate = new Date(date)
console.log(startDate)
->> 2019-08-07T12:53:56.811Z
when I am trying to insert to db.it changes with another hour.
let newTask = Task.create({ time_to_deliver: startDate})
console.log(newTask.time_to_deliver)
->> 2019-08-08 17:23:56
what is this? is it something about timezone and UTC time stuff?
I think if you will make the "startDate" key in your DB of 'Date' type instead of 'String' type it will work. I have checked this with MongoDB and it worked for me.
"startDate: {type: Date}"
according to #barbsan answer . sequelize changes the date to toLocalString() format. in querying return data it turns to the actual date.
you can simply use this javascript functions for better enhancement
var d = new Date("July 21, 1983 01:15:00");
var n = d.getDate(); //this will give you 21
there is also a similar function available - getMonth(),
First, get this date day and month and time [for the time you can use these functions => 1. getTime() and 2. new Date().toISOString()]
and then send these things separately and combine them whenever you want retrieve.
There is the also second approach;
First, convert your date and time into a timestamp and enter that timestamp into the database.
var myDate="26-02-2012";
myDate=myDate.split("-");
var newDate=myDate[1]+"/"+myDate[0]+"/"+myDate[2];
alert(new Date(newDate).getTime());
For example if I do for the above date object something like: value.hours(), I get as output 16 instead of 18. I believe it returns the hours in the original GMT time, not like in my date object which is GMT+2. I can of course add 2 to the returned result, but it becomes cumbersome. Is there any way to get the hours correctly in my case?
I'm not sure as to what you've already tried, but I put the following into JSFiddle and it worked like a charm. I am currently in CST in America and it is 8:30 in the morning here. When I ran the snippet below I got today's date at 1:30 PM which I would assume is accurate in difference.
HTML
<div id="m1"></div>
JavaScript
var a = moment.tz(new Date(), "GMT");
document.getElementById('m1').innerHTML = a.format("YYYY MM DD; HH:mm");
The Moment.js documentation states the following in regards to creating a Moment object with a native JavaScript Date object:
You can create a Moment with a pre-existing native JavaScript Date object.
var day = new Date(2011, 9, 16);
var dayWrapper = moment(day);
This clones the Date object; further changes to the Date won't affect the Moment, and vice-versa.
To find the information quoted above quickly, when you reach the Moment.js documentation, it is located under the Parse section under sub-section Date.
To display local time:
value.local();
value.hours(); // 18
To reverse:
value.utc();
value.hours(); // 16
I think that you can solve it by doing what the docs says. Something like this:
moment().tz("America/Los_Angeles").format();
https://momentjs.com/timezone/docs/#/using-timezones/
Using Moment.js I can't transform a correct moment object to a date object with timezones. I can't get the correct date.
Example:
var oldDate = new Date(),
momentObj = moment(oldDate).tz("MST7MDT"),
newDate = momentObj.toDate();
console.log("start date " + oldDate)
console.log("Format from moment with offset " + momentObj.format())
console.log("Format from moment without offset " + momentObj.utc().format())
console.log("(Date object) Time with offset " + newDate)
console.log("(Date object) Time without offset "+ moment.utc(newDate).toDate())
Use this to transform a moment object into a date object:
From http://momentjs.com/docs/#/displaying/as-javascript-date/
moment().toDate();
Yields:
Tue Nov 04 2014 14:04:01 GMT-0600 (CST)
As long as you have initialized moment-timezone with the data for the zones you want, your code works as expected.
You are correctly converting the moment to the time zone, which is reflected in the second line of output from momentObj.format().
Switching to UTC doesn't just drop the offset, it changes back to the UTC time zone. If you're going to do that, you don't need the original .tz() call at all. You could just do moment.utc().
Perhaps you are just trying to change the output format string? If so, just specify the parameters you want to the format method:
momentObj.format("YYYY-MM-DD HH:mm:ss")
Regarding the last to lines of your code - when you go back to a Date object using toDate(), you are giving up the behavior of moment.js and going back to JavaScript's behavior. A JavaScript Date object will always be printed in the local time zone of the computer it's running on. There's nothing moment.js can do about that.
A couple of other little things:
While the moment constructor can take a Date, it is usually best to not use one. For "now", don't use moment(new Date()). Instead, just use moment(). Both will work but it's unnecessarily redundant. If you are parsing from a string, pass that string directly into moment. Don't try to parse it to a Date first. You will find moment's parser to be much more reliable.
Time Zones like MST7MDT are there for backwards compatibility reasons. They stem from POSIX style time zones, and only a few of them are in the TZDB data. Unless absolutely necessary, you should use a key such as America/Denver.
.toDate did not really work for me, So, Here is what i did :
futureStartAtDate = new Date(moment().locale("en").add(1, 'd').format("MMM DD, YYYY HH:MM"))
hope this helps
Since momentjs has no control over javascript date object I found a work around to this.
const currentTime = new Date();
const convertTime = moment(currentTime).tz(timezone).format("YYYY-MM-DD HH:mm:ss");
const convertTimeObject = new Date(convertTime);
This will give you a javascript date object with the converted time
The question is a little obscure. I ll do my best to explain this. First you should understand how to use moment-timezone. According to this answer here TypeError: moment().tz is not a function, you have to import moment from moment-timezone instead of the default moment (ofcourse you will have to npm install moment-timezone first!). For the sake of clarity,
const moment=require('moment-timezone')//import from moment-timezone
Now in order to use the timezone feature, use moment.tz("date_string/moment()","time_zone") (visit https://momentjs.com/timezone/ for more details). This function will return a moment object with a particular time zone. For the sake of clarity,
var newYork= moment.tz("2014-06-01 12:00", "America/New_York");/*this code will consider NewYork as the timezone.*/
Now when you try to convert newYork (the moment object) with moment's toDate() (ISO 8601 format conversion) you will get the time of Greenwich,UK. For more details, go through this article https://www.nhc.noaa.gov/aboututc.shtml, about UTC. However if you just want your local time in this format (New York time, according to this example), just add the method .utc(true) ,with the arg true, to your moment object. For the sake of clarity,
newYork.toDate()//will give you the Greenwich ,UK, time.
newYork.utc(true).toDate()//will give you the local time. according to the moment.tz method arg we specified above, it is 12:00.you can ofcourse change this by using moment()
In short, moment.tz considers the time zone you specify and compares your local time with the time in Greenwich to give you a result. I hope this was useful.
To convert any date, for example utc:
moment( moment().utc().format( "YYYY-MM-DD HH:mm:ss" )).toDate()
let dateVar = moment('any date value');
let newDateVar = dateVar.utc().format();
nice and clean!!!!
I needed to have timezone information in my date string. I was originally using moment.tz(dateStr, 'America/New_York').toString(); but then I started getting errors about feeding that string back into moment.
I tried the moment.tz(dateStr, 'America/New_York').toDate(); but then I lost timezone information which I needed.
The only solution that returned a usable date string with timezone that could be fed back into moment was moment.tz(dateStr, 'America/New_York').format();
try (without format step)
new Date(moment())
var d = moment.tz("2019-04-15 12:00", "America/New_York");
console.log( new Date(d) );
console.log( new Date(moment()) );
<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.24.0/moment.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/moment-timezone/0.5.23/moment-timezone-with-data.min.js"></script>
moment has updated the js lib as of 06/2018.
var newYork = moment.tz("2014-06-01 12:00", "America/New_York");
var losAngeles = newYork.clone().tz("America/Los_Angeles");
var london = newYork.clone().tz("Europe/London");
newYork.format(); // 2014-06-01T12:00:00-04:00
losAngeles.format(); // 2014-06-01T09:00:00-07:00
london.format(); // 2014-06-01T17:00:00+01:00
if you have freedom to use Angular5+, then better use datePipe feature there than the timezone function here. I have to use moment.js because my project limits to Angular2 only.
new Date(moment()) - could give error while exporting the data column in excel
use
moment.toDate() - doesn't give error or make exported file corrupt
I have a date in this string format "02/28/2012" and I want to convert it to UTC.
I'm using the jquery datepicker to select thedate and populate an inputbox. any clues?
Thanks
var datestr = "07/08/2005";
var datearr = datestr.split("/")
var utc = Date.UTC(datearr[2],datearr[0],datearr[1]);
var utcdate = Date.UTC(2012,2,28);
The other answers are good, but they will give you the wrong result.
In Javascript, the month argument is zero-indexed, so make sure to subtract 1 from the standard month number,
var utcms = Date.UTC(2012,2-1,28);
Unfortunately jquery .datepicker.parseDate(str) injects a local timezone (it would be nice if the documentation said this), and Date(str) and Date.parse(str) appear unpredictable about their treatment of local vs UTC.
I am trying to manipulate a javascript date object, to increment it by one day:
var now = new Date(+1 day);
What are the javascript options for something like this...
EDIT: cheers
Like this:
var now = new Date();
now.setDate(now.getDate() + 1);
setDate will correctly convert January 32 into February 1.
Like this:
var myDate=new Date();
myDate.setDate(myDate.getDate()+1);
setDate will increase the current date with 1, hope this will help.
Some straightforward answers have been posted, but just do you know, W3Schools has a fantastic Javascript date object reference page.