From 88d2c3909f98d631174036d27887b440a3c8cf20 Mon Sep 17 00:00:00 2001
From: Paul Eggert <eggert@cs.ucla.edu>
Date: Mon, 28 Feb 2022 14:45:25 -0800
Subject: [PROPOSED] Fix Lubumbashi between 1897 and 1929

(Thanks to Alois Treindl.)
* backzone (Africa/Lubumbashi): +01 from 1897 to 1920.
---
 backzone | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/backzone b/backzone
index 8708467..6e45808 100644
--- a/backzone
+++ b/backzone
@@ -346,7 +346,15 @@ Zone	Africa/Luanda	0:52:56	-	LMT	1892
 			1:00	-	WAT
 
 # Democratic Republic of the Congo (east)
-Zone Africa/Lubumbashi	1:49:52 -	LMT	1897 Nov 9
+#
+# From Alois Treindl (2022-02-28):
+# My main source for its time zone history is
+# Henri le Corre, Régimes horaires pour l'Europe et l'Afrique.
+# Shanks follows le Corre.  As does Françoise Schneider-Gauquelin in her book
+# Problèmes de l'heure résolus pout le monde entier.
+#
+Zone Africa/Lubumbashi	1:49:52 -	LMT	1897 Nov  9
+     			1:00	-	WAT	1920 Apr 25
 			2:00	-	CAT
 
 # Zambia
-- 
2.32.0

