Happy Birthday To The Heidelberg Catechism (2016) by R. Scott Clark on January 19, 2016 The catechism was published on this date (Julian calendar) in 1563. Here are some resources: Introduction to the Heidelberg Catechism Happy Birthday (2010) Happy Birthday (2011) Happy Birthday (2013) Which Translation of the Catechism? Outstanding Resources For Understanding the Catechism Twitter