Parents supporting the Let Our Kids Be Kids campaign have kept children out of school.
More than 40,000 parents have signed a petition calling for primary school tests, which are due to be taken later this month, to be scrapped.
The number of children kept at home today (3 May) is still unsure.
A social media campaign has been urging parents to take children on educational activities for the day.
The campaign organisers say children are "over-tested, over-worked and in a school system that places more importance on test results and league tables than children's happiness and joy of learning."
The charter aims to make food education for children and young people a priority and act as a catalyst for change, improving provision in Bristol and beyond.
The government has updated its guidance on school uniforms, calling for schools to start limiting branded uniform and PE Kit items ahead of the Children’s Wellbeing & Schools Bill.
The government has secured partnerships with household brands Morrisons, Sainsbury’s and Weetabix, as well as Magic Breakfast, which will see early adopter schools of the free breakfast scheme benefit from discounts and free deliveries.