If it where that simple...

weeks are tricky on this earth..

First which kind of week:

http://en.wikipedia.org/wiki/Week

then if we all decide that we are talking about the 7 days week:

http://en.wikipedia.org/wiki/Seven-day_week

what is week 1?? which week 1 are we talking about?
The one from most of Europa or the one from UK/USA?

http://en.wikipedia.org/wiki/Seven-day_week#Week_number

happily this year usa and europa are in sync..so no problems there. Hopefully the N900 wont be delayed until next year because then we have a week 1 problem! (usa/uk 27 dec -> 2 jan) but in the rest of europe week 1 is 4 jan -> 10 jan!