When is the best time to do your practice runs

As my league is currently in its hiatus for the christmas break, it has been on my mind of when is the best time to do your practice runs, ive always thought that if i do it the day of the race in advance so i dont lose time before its locked, does anybody else have any ideas

doesn't matter too much, but bear in mind that conditions could change if you do them too early

Idealy just before the race locks

I run my pratice session time permitting approx 30 minutes before the race is starts.

BD

This is what I try to do, although I fail at it maybe 90% of the time.

ah right, thanks guys