Amsterdam Time

From Freepedia

Amsterdam Time, also called Dutch Time was a time zone that existed in the Netherlands from 1909 to 1940. The timezone was GMT +0h 19m 32.13s until March 17 1937, when it was simplified to GMT +0h 20m. So when it was 12 O'clock in Amsterdam, it was 11:40 in London and 12:40 in Berlin. When the Germans occupied the Netherlands the Berlin Time was adapted. The time zone wasn't rechanged after World War II.