Юрьев день
Exceptionally in the Czech Republic, Hungary and Slovakia, Saint George's Day comes on 24 April. The reason why it was moved from 23 April in case of the Czech's "svátek sv. Jiří" is, that there is a day of St. Adalbert of Prague (in Czech Svatý Vojtěch), Czech national patron saint, who was martyred on 23 April 997. It is celebrated in a special way.