Timing differences UK and Germany during 1940-1945

This article on “Timing differences UK and Germany during 1940-1945” was published in Bulletin Air War 1939-1945 (Dutch Studygroup Air War WW2) Nr. 99 pages 26/27 as “Time calculation 1940-1945” by the late Rob de Bruin, Great Bookham, England, member of the Studygroep, translated by Mr Jaap Woortman, also a member of the same Studygroup.

Mr Woortman checked two sources: first his own Whitaker Almanac and he also contacted the Royal Observatory at Greenwich. The situation is as follows:

  1. Since 1916 Great Britain (from now on called England) has summertime. In winter they have GMT and in summer GMT+1.
  2. Middle European Time (MET), that was the time in the Netherlands during the German occupation; it was equal to GMT+1 and during the summer MET is equal to GMT+2.
  3. The English introduced on February 25th, 1940, their summertime GMT+1. In the Netherlands we had Dutch time. This means that from February 25th, 1940, it was 40 minutes later in England than in Holland. From May 16th, 1940, the Germans introduced MET and the Dutch were one hour ahead of the English.
  4. In England it was summertime during the war from February 25th, 1940, till October 7th, 1945.
  5. To get more daylight it went over to Double British Summertime (DBST). This was during:
    • a – 1941 – May 4th till August 10th;
    • b – 1942 – April 5th till August 9th;
    • c – 1943 – April 4th till August 15th;
    • d – 1944 – April 2nd till September 17th, and
    • e – 1945 – April 2nd till July 15th.
  6. During these periods the time in England was GMT+2 and that’s the same as MET (Summertime).
  7. To make things more clear some examples:
    • Date – Time in Holland/Germany – Time in England:
    • 30-05-1940 – 12.28 – 11.28;
    • 22-06-1941 – 06.05 – 06.05;
    • 03-11-1942 – 14.18 – 14.18;
    • 01-04-1943 – 23.25 – 22.25;
    • 01-05-1943 – 20.08 – 20.08;
    • 06-06-1944 – 05.30 – 05.30,
    • 05-05-1945 – 08.00 – 09.00.
  8. The change of time was done in the early Sunday morning hours at 2.00 o’clock.
  9. Here follows a list of dates when the German time was equal to British time:
    • a – 1941 – May 4th till August 10th;
    • b – 1942 – April 5th till August 9th and November 2nd till December 31th;
    • c – January 1th till March 29th and April 4th till August 15th and October 4th till December 31th;
    • d – 1944 – January 1th till April 2nd and April 4th till September 17th and October 2nd till December 31th,
    • e – 1945 – Januari 1st till April 2nd

Information Courtesy: jossclercq