From 06acead835e5534c95acd9501e2c916f2dc65a5d Mon Sep 17 00:00:00 2001 From: Paul Eggert Date: Wed, 14 Dec 2016 14:10:14 -0800 Subject: [PROPOSED] * europe (Spain): Document early fallback transitions better. (Thanks to Tim Parenti for the heads-up.) --- europe | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/europe b/europe index 6c755b2..8f96a09 100644 --- a/europe +++ b/europe @@ -3231,13 +3231,22 @@ Link Europe/Prague Europe/Bratislava # Spain # -# From Paul Eggert (2016-12-13): +# From Paul Eggert (2016-12-14): +# # The source for Europe/Madrid before 2013 is: # Planesas P. La hora oficial en España y sus cambios. # Anuario del Observatorio Astronómico de Madrid (2013, in Spanish). # http://astronomia.ign.es/rknowsys-theme/images/webAstro/paginas/documentos/Anuario/lahoraoficialenespana.pdf # As this source says that historical time in the Canaries is obscure, # and it does not discuss Ceuta, stick with Shanks for now for that data. +# +# In the 1918 and 1919 fallback transitions in Spain, the clock for +# the hour-longer day officially kept going after midnight, so that +# the repeated instances of that day's 00:00 hour were 24 hours apart, +# with a fallback transition from the second occurrence of 00:59... to +# the next day's 00:00. Our data format cannot represent this +# directly, and instead repeats the first hour of the next day, with a +# fallback transition from the next day's 00:59... to 00:00. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Spain 1918 only - Apr 15 23:00 1:00 S -- 2.7.4