What day of the week does 'The Week' magazine come out?

I was wondering if anyone can help me in telling me which day 'The Week' magazine (in the UK) comes out? I believe it to be either on Fridays or Saturdays but i'm not entirely sure!

Can someone who knows please let me know and also if they know of any shops that sell hard copies each week??

Thanks in advance - it's important I pick up a copy as I need to learn alot about it in the next couple of days :)

Here's a link to the website: http://www.theweek.co.uk/ (I can't find this info on there at all!!)