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Bug #73596 IntlDateFormatter fails to parse valid dates
Submitted: 2016-11-23 22:41 UTC Modified: 2021-06-23 12:00 UTC
Votes:4
Avg. Score:4.0 ± 1.0
Reproduced:4 of 4 (100.0%)
Same Version:2 (50.0%)
Same OS:1 (25.0%)
From: thomas dot lallement at 9online dot fr Assigned: cmb (profile)
Status: Not a bug Package: intl (PECL)
PHP Version: 7.1.0RC6 OS: Ubuntu / Red Hat
Private report: No CVE-ID: None
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 [2016-11-23 22:41 UTC] thomas dot lallement at 9online dot fr 
Description:
------------
You can follow this link to see the current issue that is relevant on all version of php (even in 7.0.x or 7.1.0-RC6):

https://3v4l.org/GZlSs

The fact is that given the Timezone, the parsing can fail on different dates. The following code is used by Symfony Framework in a data transformer (DateTimeToLocalizedStringTransformer) that is used to parse date enter in Date and DateTime fields.

https://github.com/symfony/symfony/issues/20593

Test script:
---------------
https://3v4l.org/GZlSs

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 [2021-01-12 17:48 UTC] cmb@php.net
-Status: Open +Status: Feedback -Assigned To: +Assigned To: cmb
 [2021-01-12 17:48 UTC] cmb@php.net 
This might be an upstream issue.  Have you file a bug report there?
 [2021-01-12 20:15 UTC] thomas dot lallement at 9online dot fr
-Status: Feedback +Status: Assigned
 [2021-01-12 20:15 UTC] thomas dot lallement at 9online dot fr 
What do you mean by upstream issue?
 [2021-01-12 20:29 UTC] cmb@php.net
-Status: Assigned +Status: Open -Assigned To: cmb +Assigned To:
 [2021-01-12 20:29 UTC] cmb@php.net 
I'm referring to ICU - International Components for Unicode:
<http://site.icu-project.org/home>.
 [2021-06-23 12:00 UTC] cmb@php.net
-Status: Open +Status: Not a bug -Assigned To: +Assigned To: cmb
 [2021-06-23 12:00 UTC] cmb@php.net 
Actually, this is not a bug.  The dates that failed to parse are
dates on which a DST shift happened for Europe/Malta, and the
clock was forwarded from 00:00 to 01:00, so 00:00 doesn't exist.
Use lenient mode if you have to process such dates.
 
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