[jira] [Created] (PDFBOX-2420) DateConverter doesn't handle time zones outside -12 to +12 range properly

["Arjohn Kampman (JIRA)" <ji...@apache.org>]

Arjohn Kampman created PDFBOX-2420:
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             Summary: DateConverter doesn't handle time zones outside -12 to +12 range properly
                 Key: PDFBOX-2420
                 URL: https://issues.apache.org/jira/browse/PDFBOX-2420
             Project: PDFBox
          Issue Type: Bug
          Components: Utilities
    Affects Versions: 2.0.0
            Reporter: Arjohn Kampman


DateConverter normalizes time zones in restrainTZoffset(...) to a value that is between -12:00 and +12:00. So a time zone like +13:00 gets normalized to -11:00. However, the date itself is not adapted accordingly. As a result, a time stamp like "2014-7-20T05:0:00+1300" gets changed to "2014-7-20T05:0:00-1100", which is actually 24 hours later! To compensate for the time zone change, 24 hours should have been subtracted from the date: "2014-7-19T05:0:00-1100".

Personally, I'd prefer to leave the time zones untouched completely. Note that XML Schema defines time zones up to +/- 14:00 to be valid: http://www.w3.org/TR/xmlschema-2/#dateTime-timezones. For any time zones out of that range either generate an error or consider a garbage-in-garbage-out policy.



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