https://issues.dlang.org/show_bug.cgi?id=15655

          Issue ID: 15655
           Summary: SysTime.from*String incorrectly accept single digit
                    time zones and minutes > 59
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: P1
         Component: phobos
          Assignee: nobody@puremagic.com
          Reporter: issues.dlang@jmdavisProg.com

"+08" and "-08" would be valid for a time zone per ISO 8601, as should be "+08:00" and "-08:00" for the extended format and "+0800" and "-0800" for the non-extdended format. However, strings like "+8" or "-8" are not legal. It must be +hhmm, -hhmm, +hh, or -hh for non-extended and +hh:mm, -hh:mm, +hh, or -hh for extended. And currently, SysTime.from*String is not properly strict about the time zone, allowing +h and -h when there are no minutes (even though it is properly strict when there are minutes) and is not strict about the number of digits in the minutes. In addition, it is not strict about whether the number of minutes is actually valid (e.g. "+07:60" should not be valid).

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