This is surely very simple, but I'm struggling (possibly because I'm slightly drunk...). My local pub has a quiz night every second Friday. What I want to do is display on their site when the next quiz is. So (at the time of writing), it should be the 18th March 2011, on Saturday (19th) it should show the 1st April. I thought this would be easy to do using date week numbers but although I can determine whether the week number is a quiz week or not, I'm struggling to turn that week number back into a Friday date. Can anyone help and expose my ignorance?