I think a Harvest bank holiday would be an excellent idea for a country with a mainly urban population.
Survey after survey shows how unaware people are about where there food comes from and how they cannot recognise many foodstuffs they eat when shown them in their raw or unprocessed state.
If it was made a celebration of food we eat, with Food festivals in local parks and museums and libraries running displays on the rural past of every city suburb, allottments having open days and the NT running food themed events.
It could contribute to the fight against obesity. Showing food to be fun and fabulous, home cooking easy and eating being something to celebrate rather than that dull, dreary, reading signposts on packets and keeping to 'daily limits' dictated by humourless faceless bureaucrats.