[identity profile] bohemiancoast.livejournal.com 2008-11-14 09:50 am (UTC)(link)
I really have three different answers.

First; I was brought up to believe it was Sunday, that Sunday is the 'right' answer to this question (and it's what I've ticked) -- it's the day of the Resurrection and therefore starts the week anew.

Second; my working week starts on Monday and like many people I think 'hey, ho, a new week'.

But third: I don't work Fridays, and in many real senses my actual week, the important week, the week that matters, starts at 6pm on Thursday evening.

[identity profile] marrog.livejournal.com 2008-11-15 03:25 am (UTC)(link)
Yeh, I've never understood it either, because I always thought that the week in Christianity is logically defined with the 'day of rest', ie: Sunday, representing the seventh day (when God rested) in the creation myth, and therefore demonstrably the end of the week since that particular creation myth is the 'reason' for the seven day week. But my Grandad insists on his calendars having Sunday at the start, and will go as far as to cut them up and stick them together again if they're 'wrong'.