When you weren't at school, summer holidays etc.
We used to just play knockout on the park all day. Usually singles but if there was a lot of us we'd play doubles. Never used to play 'redarse', I think that came about later, and I hated it. Knockout was the best. When I was about 10 I used to go out with my older brother after school and play footy on the playground of a school near here with grown men. If other people were on it we'd play infront of the Co-op right next to the main road and nearly break it's glass front in the process.