VarDateFromStr parses yyyy-mm-dd as yyyy-dd-mm in European locales

John Fremlin john at
Sat Apr 23 13:22:01 CDT 2011

Nikolay Sivov <bunglehead at> writes:

> On 4/23/2011 19:00, John Fremlin wrote:
>> Europeans write dates generally as dd-mm-yyyy. This makes sense. So does
>> yyyy-mm-dd. Native will parse dates written yyyy-mm-dd correctly. Wine for some
>> reasons assumes they are yyyy-dd-mm. This is not a date ordering used anywhere
>> as far as I know and contradicts the MS behaviour.
>> I've submitted
>> I've included a patch which fixes the problem and adds a testcase. Is
>> there anything I can do to improve the chances that this fairly
>> unambiguous fix meets the next release? -- I have some secret and
>> cunning plans which are unfortunately predicated on this being fixed.
>> @@ -3458,6 +3458,7 @@ static void test_VarDateFromStr(void)
>>     DFS("02.01.1970"); EXPECT_DBL(25570.0);
>>     DFS("02.13.1970"); EXPECT_DBL(25612.0);
>>     DFS("02-13-1970"); EXPECT_DBL(25612.0);
>> +  DFS("2020-01-11"); EXPECT_DBL(43841.0);
> Hi, John.
> This is locale-dependent thing, so it will need at least more tests
> for different locales (locales with different default month/day order
> I mean).
Hi Nikolay,

Is there really ever a locale which actually parses ydm under the native

The patch is clearly an improvement I think . . . I could restrict it
solely to apply to the English UK locale if that would satisfy the
concern? It would meet my needs.

I've tested it under English UK for all dates up to 100k (which crashed
gcc amusingly until compiled without optimization). 

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