Alois Treindl wrote:
Brussels was occupied by the Germans on 20 August 1914.
Sorry, I don't recall the source for that transition. But here's a quote that may explain the situation better: 'In early November 1914, the Germans imposed the time zone used in central Europe and forced the inhabitants to set their watches and public clocks sixty minutes ahead. Many were reluctant to accept “German time” and continued to use “Belgian time” among themselves. Reflecting the spirit of resistance that arose in the population, a song made fun of this change:' The song itself is a bit long to send in this email. My source: Pluvinage G. Brussels on German time. Cahiers Bruxellois – Brusselse Cahiers. 2014;XLVI(1E):15–38. https://www.cairn.info/revue-cahiers-bruxellois-2014-1E-page-15.htm which gives the following as the source for the song, the original version of which was presumably in French: Rainer Hiltermann Collection, Revue Hebdomadaire de la Presse Française (an underground weekly review of the French press), 1916.