translate English to German: On the days of the equinoxes (first day of spring and autumn), the times of sunrise and sunset along a meridian are the same. On the first day of summer, in a place at a latitude of 54 degrees north (near Rostock), the sun rises 33 minutes earlier than in a place at the same longitude but at a latitude of 48 degrees north (the parallel which runs through Freiburg).
Außerhalb dieser Zeitspanne gilt Mitteleuropäische Zeit MEZ: Eine Stunde ist zu addieren.