I don't have an Orthodox calendar and I'd be glad if I had one. The "old calendar – new calendar" story sounds interesting. Like the October revolution that took place in November. This could be the key to understand the difference. I have heard some religious groups still use the old calendar. Thank for this useful hint! I have a number of Sints' books and dictionaries, most of them Catholic (nothing Greek or Russian, couldn't read the latter anyway). There is a very useful three volume dictionary (in Germans though): Herder Lexikon der Heiligen und Heiligenverehrung, 2003.