"It's really a great day out for mum, dad and the kids to get out and see the races - it's absolutely free, there's something going on all the time for the kids," Mr Paterson said.
The first of the eight races will start at 1.28pm, with the last at 5.35pm. Mr Paterson said this meant there would be plenty of time to do the chores in the morning before heading off to Arawa Park in the afternoon.
The garden bar would be open for adults, with music performed by "one-man band" Max Cleaver.
"It's a good way to start Anniversary Weekend, then the kids are back to school. It's the last chance to get out and have a bit of fun with the family - so many people have spent a lot of money these holidays, it's all free here. It's a cost-effective way to keep the kids entertained."
Alcohol or wine may be taken to Arawa Park. One bottle of wine or six beer "stubbies" are allowed per adult of legal drinking age. No spirits, RTDs, kegs or crates are allowed, bags may be checked on course. BYO is not permitted in the grandstands and lounges.