1st Track day - on old tyres?

[freeride]

I have purchased a 997.1 turbo and want to take it on some track days this year.
The tyres on the car are old and require replacing details below:
Front right 6mm sidewall date 2009
Front left 4mm sidewall date 2006
Rear right 5mm sidewall date 2010
Rear left 5.5mm sidewall date 2011

Do I rinse them on my first track day or kickoff my first track day with new fresh rubber?

[freeride]

Thanks all for your feedback, looks like i will keep the old ones on then. I wont be pushing hard as i want to try and keep out of the bushes!
Castle Combe is where i'm thinking of going as it is relatively local and they offer (much needed) tuition as part of the cost....