Census 21 is Sunday 21st March
The census is a survey that happens every 10 years and gives us a picture of all the people and households in England and Wales. All kinds of organisations, from local authorities to charities, use the information to help provide the services we all need, including transport, education and healthcare. Without the census, it would be much more difficult to do this.
The Office of National Statistics have published this guide answering many of the common questions people have.