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Re: to_date()/to_timestamp() silently accept month=0 and day=0 - Mailing list pgsql-bugs

From Daniel Gustafsson
Subject Re: to_date()/to_timestamp() silently accept month=0 and day=0
Date
Msg-id FE1D12FF-7E5D-4ED0-A59F-BEA6DEF7EE2C@yesql.se
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In response to Re: to_date()/to_timestamp() silently accept month=0 and day=0  (Michael Paquier <michael@paquier.xyz>)
Responses Re: to_date()/to_timestamp() silently accept month=0 and day=0
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> On 23 Apr 2026, at 09:57, Michael Paquier <michael@paquier.xyz> wrote:

> Perhaps we could consider strengthening such inputs on HEAD once v20
> opens for business?  It would be really a scary thing to backpatch,
> still a major release is a different thing.

This could definitely not be backpatched IMO, a quick check in v14 shows the
same behaviour.  The gregorian calendar goes from BC1 to AD1 and does not
define a year 0, to_date('0000','YYYY') correctly returns year 0001, handling
months/days in the same way at least makes it consistent (though I didn't scour
the archives to see if it was intentionally done like that).

--
Daniel Gustafsson

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