JKR has updated her site today -- WEBSITE SPOILER!

[justcarol67]

No: HPFGUIDX 158309

--- In HPforGrownups at yahoogroups.com, doug rogers <dougsamu at ...> wrote:
>
> Carol67:
> 
> > September 1 is always a Monday, so
> > October 31 should always be a Friday.
> 
> doug:
> 
> Uhm... September first was a Friday this year.
>
Carol responds:
In RL, yes. But one of the peculiarities of the Potterverse is that
September 1 always a Monday in the HP books. Sorry to be unclear.

Carol, regretting that she's wasted a post