Unable to parse some dates into ZonedDateTime

Question

Trying to parse incoming dates from a third-party source, some dates work as expected others throw an exception:

Text 'Fri, 11 Jun 2021 02:25:23 +0000' could not be parsed at index 8

Looking at the dates I can't spot a difference in them, and looking at my formatter I can't see where I've gone wrong.

Example failing date: Fri, 11 Jun 2021 02:25:23 +0000
Example passing date: Sun, 30 May 2021 11:42:03 +0000

The code I'm using to parse the dates:

ZonedDateTime.parse(incomingDate, DateTimeFormatter.ofPattern("E, d MMM yyyy HH:mm:ss Z"));

The only thing I can think that some date months are shorthand vs others that are not (May vs Jun for example).

Would love some help.

I've tried running your code locally and nothing is wrong with it. My output was correct for both dates you shared: `2021-06-11T02:25:23Z` and `2021-05-30T11:42:03Z`. Can you share what's failing? Erro and stacktrace perhaps? — Lucas Campos, Jun 18 '21 at 08:31
Both work for me. Is your system language and region set to somewhere that doesn't call June "Jun"? If so, set the locale of the date formatter with `withLocale(Locale.ENGLISH)`. — Sweeper, Jun 18 '21 at 08:32
[Never use SimpleDateFormat or DateTimeFormatter without a Locale](https://stackoverflow.com/a/65544056/10819573) — Arvind Kumar Avinash, Jun 18 '21 at 08:46

score 1 · Accepted Answer · answered Jun 18 '21 at 08:35

1

        String incomingDate1 = "Fri, 11 Jun 2021 02:25:23 +0000";
        String incomingDate2 = "Sun, 30 May 2021 11:42:03 +0000";

        ZonedDateTime parsed = ZonedDateTime.parse(incomingDate1,
                DateTimeFormatter.ofPattern("E, d MMM yyyy HH:mm:ss Z", Locale.ENGLISH));

        System.out.println(parsed);

answered Jun 18 '21 at 08:35

Georgii Lvov

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The Locale was the missing part... Odd though because I'm just in a generic US locale, nothing different about it. Thanks for this though – Chris Jun 18 '21 at 08:45
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@ChrisTurner Try using your default locale to _format_ a date and see what `MMM` formats month 6 as. – Sweeper Jun 18 '21 at 08:47

Unable to parse some dates into ZonedDateTime

1 Answers1