Why is wednesday roast dinner day?

Is it just co incidence or are there are cultural reasons I am unaware of? Just seems to be lots of schools choose to serve roast dinners on a wednesday. Had a discussion with a year 3 class today about their favourite dinner. Roast was extremely popular with spghetti bols coming a close second. Pudding was wide open with kids finding it hard to choose.Quite a strong showing for sponge and custard but smoothies and fruit salad came a close second.

You can vote for your favourite here. Support National School Meals Week and get your childs school to sign up.