Issue with luxon date time parsing when zone is present in string - luxon

I am seeing error the input "06/09/22 02:14 CDT" can't be parsed as format MM/dd/yy HH:mm ZZZZ` when trying to get luxon date time from string.
DateTime.fromFormat("06/09/22 02:14 CDT","MM/dd/yy HH:mm ZZZZ")
Not sure what is the valid format I need to use when there is time zone in date string.
Thanks.

Issue is that you input contains CDT that is not recognized by Luxon since ZZZZ is not a valid token as explained in the Parsing -> Limitations section of the docs:
Not every token supported by DateTime#toFormat is supported in the parser. For example, there's no ZZZZ or ZZZZZ tokens. This is for a few reasons:
Luxon relies on natively-available functionality that only provides the mapping in one direction. We can ask what the named offset is and get "Eastern Standard Time" but not ask what "Eastern Standard Time" is most likely to mean.
Some things are ambiguous. There are several Eastern Standard Times in different countries and Luxon has no way to know which one you mean without additional information (such as that the zone is America/New_York) that would make EST superfluous anyway. Similarly, the single-letter month and weekday formats (EEEEE) that are useful in displaying calendars graphically can't be parsed because of their ambiguity.
You can add fixed string 'CDT' in your format or remove it completely from your input. You can use zone option (America/New_York in the example above, or America/Chicago in your use case) of DateTime#toFormat to take into account timezone offset.
Example:
const DateTime = luxon.DateTime;
const dt1 = DateTime.fromFormat("06/09/22 02:14 CDT","MM/dd/yy HH:mm 'CDT'", {zone: 'America/Chicago'})
const dt2 = DateTime.fromFormat("06/09/22 02:14", "MM/dd/yy HH:mm", {zone: 'America/Chicago'})
console.log(dt1.toISO());
console.log(dt2.toISO());
<script src="https://cdn.jsdelivr.net/npm/luxon#2.4.0/build/global/luxon.min.js"></script>

Related

Convert TimeZone offset to TimeZone text

I have a string in format "2019-04-25T16:34:28-05:00". I have parsed the string by joda-time by pattern "yyyy-MM-dd'T'HH:mm:ssZ".
DateTimeFormatter df = DateTimeFormat.forPattern(formatStr);
DateTime temp = df.parseDateTime(dateStr);
And it giving me the output in DateTime as "2019-04-25T15:34:28.000-06:00".
Until this all seems correct but I am wanting the output with TimeZone text like "04-25-2019 03:34 PM CDT".
I am formatting the DateTime object by:
DateTimeFormatter format = DateTimeFormat.forPattern("MM-dd-yyyy
hh:mm a z");
but I am getting -06:00 still the output as "04-25-2019 03:34 PM -06:00".
How can I get the timezone name like "CDT" in place of offset?
How can I get the timezone name like "CDT" in place of offset?
You can't. -05:00 might be CDT, but it is also an offset that could apply to a large number of other time zones. For example, EST in the US, or perhaps ACT in Brazil or PET in Peru, or many others...
Even if you were to limit this problem to US time zones, consider that MST and PDT are both UTC-7, though MST applies year-round in most of Arizona while PDT only applies during daylight saving time in the Pacific time zone. If you are given a timestamp in the summer with a -07:00 offset, it is impossible to tell which it belongs to, even constrained to the US.
In other words, in order to know which abbreviation to use, you must provide a time zone identifier (such as America/Los_Angeles), not just an offset.
See also "Time Zone != Offset" in the timezone tag wiki.

Can't format the date using moment.js

Can't format the below date using moment.js, the below statement returns Invalid Date
moment('20171206T062406927Z').format('D-MMM-YYYY');
Please help me on this.
You need to tell moment which format your date string is in:
moment('20171206T062406927Z', 'YYYYMMDD[T]HHmmssSSSZ', true).format('D-MMM-YYYY');
Edit: updated as per #VincenzoC comment to ensure the timestamp is parsed in UTC
Also fix: use HH for 24-hour format (not hh), and pass a third true parameter to ensure the timestamp is parsed in strict mode.

Format hours, minutes and seconds with moment.js

I get this value from my backend service: 171054. It represents hh:mm:ss. But when I use the formatting options from the docs it gives me back 00:00:00.
Things I've tried:
moment('171054').format('hh-mm-ss')
moment('171054').format('HH-mm-ss')
moment('171054').format('HH-MM-SS')
You are confusing format option with parsing option. Since your input string is not in ISO 8601 format, you have to specify format when parsing.
Here a working example for your use case:
var mom = moment('171054', 'HHmmss');
console.log(mom.format());
console.log(mom.format('HH:mm:ss'));
<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.15.1/moment.min.js"></script>
I am not sure if momentjs can read that as date since there is no identifier. I would suggest changing the value for example you have 171054, get each 2 digits since you sure that this is represent as hh:mm:ss then add identifier between then like ":" or "-" then try us momentjs formatting again.

moment.js and deprecated warning. timestamp to moment date object

I've read thru various posts on here in regards to similiar issues but none have solved my problem.
I manipulate the moment.js date object, and then store it as timestamp.
BUT, when I try to read in that timestamp again, I get that deprecated warning.
""Deprecation warning: moment construction falls back to js Date. This is discouraged and will be removed in upcoming major release. Please refer to https://github.com/moment/moment/issues/1407 for more info."
I've tried toDate(), format(), moment(myTimeStamp, 'ddd, DD MMM YYYY HH:mm:ss ZZ'); --> all generate the warning...
So, for example, my timestamp will look like this:
const timestamp = '1458586740000'
when I read that back and try to parse out the month/day/year, then the hour/min am/pm, etc... I need to get that timestamp into a moment.js object. Nothing is working for me. Any ideas.
How can I get this timestamp: '1458586740000', into a moment.js object so I can extract date date from it as I need?
EDIT: this is how I am storing the timestamp. So I would need to retrieve it from this.
let timeStamp = Moment(state[_Date])
.add({ hour: state[AMPM] === 'PM'
? +state[Hour] + 12
: state[Hour] ,
minute: state[Min] }).format('x')
The X token indicates a unix timestamp in seconds, and the x token indicates a unix millisecond timestamp (offset).
You appear to have a millisecond timestamp, so you would make a moment out of it by doing the following:
var a = moment('1458586740000', 'x')
It works without ' as well:
var a = moment(1458586740000, 'x')
You can also not specify the x and it should work:
moment(1458586740000)
Because you have a unix offset (milliseconds), not a unix timestamp (seconds), moment.unix is not what you want.
Then you can do the following:
a.format()
"2016-03-21T13:59:00-05:00"
Or you can use any of the other formatting tokens listed here to output whatever result you would like: http://momentjs.com/docs/#/displaying/format/
Based on the code you presented, I think you may be having problems because your timestamp is stored as a string (in ''). Parsing as a string causes an invalid date error, because it attempts to match ISO 8601 format and fails. Specifying that 'x' token will cause it to assume unix offset and work correctly.

ColdFusion - DateTime Format with GMT offset

I am using ColdFusion 10 to make some REST calls and the date returned is using a GMT offset.
Example: 2013-03-25T14:30:40-04:00
I need this formatted for 2 purposes:
Screen Display so it looks something like mm/dd/yyyy hh:mm:ss
To Insert into mySQL.
I have tried a variety of the CF time/date functions but continue to get the "is not a valid date format"
I thought maybe the #ParseDateTime(i.submitted_at,"pop")# would handle it with POP but same issue.
Spent a few hours now trying multiple variations and googling around now just going in circles. Any ideas would be greatly appreciated.
Thanks!
Have a look at the UDF DateConvertISO8601() on CFLib.
DateConvertISO8601(ISO8601dateString, targetZoneOffset) on CFLib
Description:
This function take a string that holds a date in ISO 8601 and converts it to ODBC datetime, but could be adapted to convert to whatever you like. It also will convert to a datetime in a timezone of your choice by specifying the offset, i.e. it could take a datetime in GMT and convert to PT. See http://www.w3.org/TR/NOTE-datetime for description of ISO 8601, the International Standard for the representation of dates and times.
Return Values:
Returns a datetime.
The source code is viewable at the link I provided.
This, 2013-03-25T14:30:40-04:00, is a string. If you run this:
x = left(2013-03-25T14:30:40-04:00, 19);
you get 2013-03-25T14:30:40. You can use the replace function to replace the T with a space. You can then to this
DateTimeVar =parsedatetime('2013-03-25 14:30:40');
Now you have a datetime variable that you can format. If necessary you can do a datediff with the offset from GMT.
This is an informational answer, not a direct answer to the question.
ColdFusion 11 has updated the ParseDateTime() function so that it will correctly convert the ISO-8601 date/time strings to a ColdFusion datetime object.
With a number of remote requests and responses, the date / time values can often be returned in ISO format. In your case, the mask looks like this:
YYYY-MM-DDThh:mm:ssTZD (eg 1997-07-16T19:20:30+01:00)
In this ISO format, the T string is a literal representation of a marker where the time stamp starts in the string (with the offset following directly).
Below is a reusable function that will convert an ISO date format into a useable ColdFusion date time object:
<cffunction name="ISOToDateTime" access="public" returntype="string" output="false"
hint="Converts an ISO 8601 date/time stamp with optional dashes to a ColdFusion
date/time stamp.">
<cfargument name="Date" type="string" required="true" hint="ISO 8601 date/time stamp." />
<cfreturn ARGUMENTS.Date.ReplaceFirst(
"^.*?(\d{4})-?(\d{2})-?(\d{2})T([\d:]+).*$",
"$1-$2-$3 $4"
) />
</cffunction>
You can then call the function like so to output or return a ColdFusion-friendly version of the date time:
ISOToDateTime( "2013-03-25T14:30:40-04:00" )
That function is courtesy of Ben Nadel. The original blog post can be found here:
http://www.bennadel.com/blog/811-Converting-ISO-Date-Time-To-ColdFusion-Date-Time.htm
You can also convert the date time value using the offset, if required. Again, Ben Nadel has a great blog post outlining how to accomplish this:
http://www.bennadel.com/blog/1595-Converting-To-GMT-And-From-GMT-In-ColdFusion-For-Use-With-HTTP-Time-Stamps.htm
CF10 can use this code as stated in the example of the parseDateTime() doc.
<cfset string = "1997-07-16T19:20:30+01:00">
<cfset date = parseDateTime(string, "yyyy-MM-dd'T'HH:mm:ssX")>

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