well, I can only spoke from a Church of Scotland (Christian, Presbyterian)
background
but "on the 7th day he rested", making Monday the first day. :-)

Wilhelm Spickermann <Wilhelm.Spickermann@t-online.de> wrote in message
news:mailman.985085061.3354.comp.lang.ada@ada.eu.org...
>
[snip]
>
> BTW - it�s not a regional problem. It is a common jewish and christian
> practice to regard sunday as the first day of the week - as opposed to
> ISO 8601. My wife expects every calendar program to be at least
> switchable to sunday as first day whereas I prefer Monday in the
> leftmost column (and we are living in the same part of the world :-) )
>
> Wilhelm
>
>