insert of date is wrong

Marcos (tanzarian(at)bol(dot)com(dot)br) reports a bug with a severity of 3
The lower the number the more severe it is.

Short Description
insert of date is wrong

Long Description
when I insert the date '1914/01/01' in a column with the 'date' format, the table returns the value '1913/12/31'

Sample Code
insert into d values ('1914/01/01');
select * from d;
this command return : '1913/12/31'

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