Good Friday is a very important day for all Christians. On Good Friday, Christians remember that Jesus died for everyone. He was crucified by the Romans on a hill outside Jerusalem. When a person was crucified, they were tied and nailed by the wrists and feet to a large wooden cross or scaffold and left to die. This is why the cross is a symbol of Christian faith. The 'Good' in Good Friday comes from old English when Good meant Holy. So you could call Good Friday, Holy Friday.
In most Church of England churches, there are no flowers or decorations in the church on this day.
A favourite Good Friday custom is Hot Cross Buns. These are yeast dough buns with currents and raisins in them and they have a cross on top.