Develop Reference

proper way to format the date depending on scenario

I have a scenario where I can have a date coming as a string. It can be formatted as either:
2021-05-29
29-05-2021
Im using dateFns to parse the strings, but when the string is in the format 2021-05-29, it cant parse the string, which is why, when it has the format of 2021-05-29, it needs to be converted into 29-05-2021...
The parse() function from dateFns what actually what I needed to parse it to the correct format, but it doenst seem to work when passing 2021-05-29
return parse(date, 'mm-dd-yyyy', new Date());
Any ideas what how to handle this?

You could try reversing the date,
date = date.split(“-“).reverse().join(“-“)

How to compare date type in Sql to javascript date

I have a javascript date string in ISO format, e.g
dtStart = 2016-09-05T07:00:00.000Z
and I want to compare it in an SQL query to a column that is label DateTimeCollected. An example of DateTimeCollected could be 2014-06-27T00:00:00.000Z.
How could I comare these two dates in SQL by using something like
DateTimeCollected >= ${dtStart}
in the query where dtStart is a string. I am using MSsql if that is of any help.

DateTimeCollected >= CONVERT(${dtStart}, #stringDate, 126)

If you are comparing the values in Sql, you should be able to simply do this:
DateTimeCollected >= CAST(#DateTimeString As DateTime).
Assuming #DateTimeString is a char(23) variable containing a string representation of a datetime value following the ISO8601 format (yyyy-mm-ddThh:mi:ss.mmm)
In fact, you can also do this without the casting, because Sql server will implicitly cast the string into a datetime data type. However, I beleive it's better to use explicit casting since it's more readable.
As I wrote in the comment, SQL Server should always cast the correct date if it's passed as a string following the ISO8601 format.

node.js cannot parse ISOString date?

We store every date data in ISO format using new Date().toISOString().
I tried to convert this ISO formatted date into Date object in node.js but I get Invalid Date response.
date string is isoDate = 2014-07-09T14:00:00.000Z
and I did console.log on Date.parse(isoDate); and new Date(isoDate);
but each returns NaN and Invalid Date.
I checked if the date string contains any invisible wrong character but they are fine and can be converted on browser console.
does this mean I need to convert the string manually and create Date object with parsed string?
Thanks for reading.

Try using moment library. It has a lot of functionality to work with dates and can easily be used both on client and server side. Calling moment("2014-07-09T14:00:00.000Z").toDate() would convert your string to a Date JavaScript Object, using this library.

I am posting this answer just in case somebody experience this like I did.
What happened to me is I thought I was sending an ISOString from the browser
{
startDate: date.startDate
}
which in fact I was sending a moment instance as parameter
When I checked in the network inspector I found out that the data being sent is in ISO format - yes, but it is enclosed in double quote ""
{
startDate: "2016-12-31T16:00:00.000Z"
}
it should not be enclosed in double qoutes and should look like this
{
startDate: 2016-12-31T16:00:00.000Z
}
what worked for me is to parse the moment to iso string
{
startDate: date.startDate.toISOString()
}

Trying to parse date using new Date(). but keep getting wrong results

I am trying to parse a date string i get from php through ajax call(which is irrelevant for now) using new Date().
however i keep getting wrong results.
My string is 2013-05-09 20:56:17
When i do
var something = new Date("2013-05-09 20:56:17");
alert(something.getMonth());
It keeps alerting 0
In my opinion for some reason new date cant parse this string.
Is there a way to specify the date format for new Date() in JS ?
My current solution is to import php's: date() and strtotime() and use them :
alert(date('m', strtotime("2013-05-09 20:56:17")));
This works however I have to use external js lib and I am pretty sure there is a better JS way to achieve that.

If you use slashes instead of hyphens, it works:
var something = new Date("2013/05/09 20:56:17");
alert(something.getMonth());
It's easy enough to replace any hyphens in a string with slashes first if you need to (say, if you were getting the date string from somewhere else):
var something = new Date("2013-05-09 20:56:17");
something = something.replace('-', '/');
It seems JavaScript's Date constructor doesn't recognize date formats with hyphens, or at least not that particular format.

Choose a different format specifier in PHP for your ajax dates. The format you expect and the format expected by the javascript are different.
var something = new Date("2013-05-09T20:56:17");
Note the 'T' which appears as a literal separator and marks the beginning of time per ISO 8601
Reference for various [browser] javascript date formats
W3 DateTime
Microsoft IE DateTime
Mozilla [Firefox] DateTime
Google DateJs
And lastly, the PHP date format specifier list:
PHP Date
PHP DateTime
Note the 'DATE_ISO8601'; but I suggest not using that at this time. Instead use 'DATE_ATOM' which may produce a date format more widely supported (comments suggest it makes iPhones happier and no issues with other browsers).
To use it in PHP:
$something = new DateTime('NOW');
echo $something->format('c');
echo $something->format(DateTime::ATOM);

hot to date indide parameter in xml

i made this code for inserting data to an system mail that know to work with xml file.
the problem is that i try to create some javascript code for getting the current date of day, and then put it inside the filed date, but without success.
i know hot create the date in javascript, my problem is in thx xml file, i mean
how can i impplemt the date inside the filed date in the xml file.
the code(xml side):
123456
NOW
COMPLETE
ENGLISH
1274
liran
**
413
3280
86308
;
UNIX
email;dateofday
liroy7#gmail.com;(i want here to return the date from the javascript)
thanks,

I'm not sure I understand, but you can use getTime() on your Date objec to insert it into the XML file as milliseconds, and if you need to convert it back into a JavaScript object you can parse it directly.
function putInXmlFile(d) {
writeToXML(d.getTime());
}
function getFromXmlFile() {
var date = new Date(getFromXML());
}
It works because the JavaScript Date object can parse from the milliseconds from the epoch (which is returned by getTime).