Recently, it seems. I went away and mis-booked my return flight when clicking on the little calendar grid.
Wasn't until I was all packed up and double-checking my flights the night before return, I realised that I'd inadvertently given myself another week's holiday. Better than vice-versa!
Yes, on a flight out to Germany I did exactly this. I didn't realise until a few days in, the cancellation fee was more than booking another flight at the correct time. After the stress of finding some internet access where I could sort it out, and praying they had space on the flight I wanted
'96 405 1.6 GLX with 306 GTI engine on Cat cams @ 195bhp