Die Kirche St. Georg am Pragfriedhof hat auch am Sonntag geöffnet. Dies soll eine Anspielung auf die vielen verkaufsoffenen Sonntage sein.
The Catholic church St. Georg is open on Sundays. The slogan is an allusion to the shops and shopping centres which are open on Sundays from time to time. I know that many large stores in the US and in Great Britain are open on Sundays, it's normal. But it's unusual in Germany.