This week on Idaho Photo is dedicated to aircraftOntario , Oregon Air FairThis last Saturday I had a chance to get away from work and relax at the Ontario Air Fair . I had never been to one and what a lot fun it is for free ! No admission was charged , I did donate to the parking fund though .
According to the above context, answer the following question.
What may be a valid fact about the air fair ?


It was held on a weekend day .