I am working on importing data in an Excel file and it has date column.
In my app, that date column value comes as a serial number like 43101.622083333335 which stands for 01/01/2018.
When converting this serial number from Excel back to the normal date it stands for, it gives wrong year.
For example, it gives 01-Jan-1970 instead of 01-Jan-2018
``
var moment = require('moment');
var excelDate = 43101.622083333335;
var date = moment(new Date(excelDate));
var dateWithNewFormat = date.format('DD-MMM-YYYY');
console.log(dateWithNewFormat);
``
Output: 01-Jan-1970 instead of 01-Jan-2018
Any help ?
Thanks in advance.
I don't think this is an issue with the moment library. It seems that you aren't calling Date with a valid constructor argument with new Date(excelDate) (see official documentation for Date here).
The Date class doesn't understand the concept of 'Excel time' but it does understand the concept of a unix timestamp. If you refer to this post, you can see how to convert from Excel time to a unix timestamp, depending on which version of Excel you are using.
Then, I would change your code to:
var moment = require('moment');
var excelDate = 43101.622083333335;
var unixTimestamp = (excelDate-25569)*86400 //as per the post above, convert Excel date to unix timestamp, assuming Mac/Windows Excel 2011 onwards
var date = moment(new Date(unixTimestamp)); //Pass in unix timestamp instead of Excel date
var dateWithNewFormat = date.format('DD-MMM-YYYY');
console.log(dateWithNewFormat);
Related
I am connected mssql database and get some informations includes Date_Time.
Time is coming like 2021-01-30T15:08:25.357Z. I want to convert it to dd-mm-yy hh:mm:ss format.
So, it should be 30-01-2021 15:08:25.
I used this method but it is not exactly that I want.
var d1 = new Date(datey).toLocaleDateString("tr")
var newTime=d1+" "+
new Date(datey).getUTCHours()+":"+
new Date(datey).getUTCMinutes()+":"+
new Date(datey).getUTCSeconds()
// it returns 30/01/2021 15:8:25
Maybe, In there, I want to see time fomat with 0 such as 15:08. When hour 2 a.m it just 2:0 but I want to see it 02:00.
How should I do , is there any idea?
I would suggest using a date/time library such as moment.js, this will make date manipulation much easier, parsing and formatting your date is then very simple:
const input= "2021-01-30T15:08:25.357Z";
console.log("Input date:", input);
// To convert the date to local before displaying, we can use moment().format()
const formattedDateLocal = moment(input).format("DD-MM-YY HH:mm:ss");
console.log("Formatted date (Local Time):", formattedDateLocal );
// To display the UTC date, we can use moment.utc().format()
const formattedDateUTC = moment.utc(input).format("DD-MM-YY HH:mm:ss");
console.log("Formatted date (UTC):", formattedDateUTC );
<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.22.2/moment.min.js"></script>
Using this on a server side (a Firebase function, nodejs )
var d=new Date();
var date = d.toLocaleString('default', { month: 'long'}) + ", " + d.getFullYear();
I am expecting to get March, 2020 , since this is what i get on the JS client side, but instead when run on the server side i get - M03, 2020 .
I tried the following code:
const date = require('date-and-time');
var d = new Date();
var myDate = d.toLocaleString('default', { month: 'long'}) + ", " + d.getFullYear();
console.log(myDate);
Output:
March, 2020
Now, if you are trying to store a Javascript Date object into Firebase, this object will be stored as a Timestamp object. I think this would explain the reason why you are noticing some discrepancies in the format.
Optionally, you can convert the Date object to String and store it in Firebase as such. This is more human-readable than ISO 8601 and Timestamp - 0001-01-01T00:00:00Z
You can read more about this in the following documentation about Timestamp and Data types. Moreover, there exists a Timestamp built-in method toDate() that returns a new Date corresponding to a certain timestamp, if conversion is needed.
I am using moment.js to work with dates and times in node.js. So far I've been able to do everything I need with it, but I am having problems formatting a time.
Here's the scenario:
User enters data (an integer), which is logged in a database, along with date (in the format YYYY-MM-DD) and time (in the format HH:MM:SS).
Next time the user goes to enter data, the previous value is read in and compared (higher, lower or equal to) the new value. However I also want to display a message such as "The last time you submitted your data was at TIME on DATE". In this case, I'd like time to be displayed in a different format (e.g. "h:mm a" i.e. "12:34 pm").
Can I use moment to format an existing date, or can moment only return current date/time? In my code I have the following function:
function userFormattedTime(time)
{
let uTime = moment(time).format('h:mm a');
return uTime
}
However when I call this function and pass it the time (taken from the database), I get "Invalid Time". What am I doing wrong?
You would parse the string from a string back to a moment object, then you can use moment to reformat the date into any other format.
I guess what you are doing wrong is not telling moment what you're sending it back, i.e. it doesn't understand the formatted string you're supplying.
Notice the format values HH:mm:ss which vary in case. The case is important and should be set to match your requirements. https://momentjs.com/docs/#/parsing/
// Original date time string
var rawDateTime = "02-02-2018 10:20:30";
// convert string to a moment object
var originalDate = moment(rawDateTime, "MM-DD-YYYY HH:mm:ss");
// Format a new string from the moment object
var newFormattedString = originalDate.format('h:mm a');
In order to calculate the difference of moment objects you can use the diff function. https://momentjs.com/docs/#/displaying/difference/
// Two different dates
var dateOne = moment("02-02-2018 10:20:30", "MM-DD-YYYY HH:mm:ss");
var dateTwo = moment("04-04-2018 10:20:30", "MM-DD-YYYY HH:mm:ss");
// Get the difference of the two dates
var diff = dateOne.diff(dateTwo);
I am trying to return search results for every document that was created on a day. Below is the query I use.
var query = Document.find({}).populate('contacts');
var gte = moment(req.query.date, 'DD-MM-YYYY').startOf('Day');
var lte = moment(req.query.date, 'DD-MM-YYYY').endOf('Day');
query.where('dates.createdAt').gte(gte).lt(lte);
This query works for some days but not all. I can't seem to understand the behaviour. Please help out.
The format of the date in the query string is DD/MM/YYYY.
Works for : 2016-04-16T00:02:30.065Z
Does not work for: 2016-04-15T19:02:59.758Z
It's wrong because you don't initialize as .utc(), and MongoDB dates are stored in UTC:
var gte = moment.utc(req.query.date, 'DD-MM-YYYY');
var lte = moment.utc(req.query.date, 'DD-MM-YYYY').endOf('Day');
And there is no need for the startOf() either.
If you don't construct like that, then the resulting Date object is skewed by the difference in the local timezone. Hence why you don't see the selection working where the hours would cross over dates.
Also if dates are coming in as 01/01/2016 then the format string would be 'DD/MM/YYYY', but one or the other is likely a typo in your question.
i am using moment for getting server time .
moment.tz.setDefault("Asia/Kolkata");
var now = new Date();
var _p_date = moment.tz(now, zone).format();
time when inserting _p_date = 2016-01-05T18:32:00+05:30
But in database date variable is type of DATETIME. and time is saved as 2016-01-05 18:32:00.
and after that when i comparing with this to get time_ago funcionality. providing me wrong estimation.
using time ago = moment("2016-01-05T18:32:00.000Z").fromNow(); // is showing In 5 hours
Since your initial timezone is lost you have to create moment.tz object with selected timezone. Try this plunker
var date = moment.tz(moment("2016-01-05T18:32:00.000Z", "YYYY-MM-DDTHH:mm")
.format('YYYY-MM-DD HH:mm'), 'Asia/Kolkata');
console.log(date.fromNow());