diff --git a/slides/base_1.md b/slides/base_1.md
index 077287a1e3969d5971a2eb3f518515135ac28cad..30bc61a0010e3087af7619ee7a591863fa171c52 100644
--- a/slides/base_1.md
+++ b/slides/base_1.md
@@ -1,6 +1,6 @@
 ---
 title: "Base I"
-date: "16 septembre 2020"
+date: "2020-09-16"
 ---
 
 # Historique (1/2)
diff --git a/slides/base_2.md b/slides/base_2.md
index 6ec3ee64f20f366d269f3a51ed71f47d0be68a06..a7d720f6be38963ea266531c7585c0bdde7c2dea 100644
--- a/slides/base_2.md
+++ b/slides/base_2.md
@@ -1,6 +1,6 @@
 ---
 title: Base II
-date: 23 septembre 2020
+date: 2020-09-23
 ---
 
 # Structures de contrôle: `switch`{.C} .. `case`{.C} (1/2)
diff --git a/slides/base_3.md b/slides/base_3.md
index 97fa763a4fa8d66102a169218c156cf43080208c..3b9aceb4b62b89a963574d0dbc64dfc41b052731 100644
--- a/slides/base_3.md
+++ b/slides/base_3.md
@@ -1,6 +1,6 @@
 ---
 title: Base III
-date: 30 septembre 2020
+date: 2020-09-30
 ---
 
 # Le C sur stackoverflow
diff --git a/slides/base_4.md b/slides/base_4.md
index 7e6e7232ad7bc40ee3e73637ec3dc29f5edc844b..0a26fe8740040863c6757a33128188f1f059fdff 100644
--- a/slides/base_4.md
+++ b/slides/base_4.md
@@ -1,6 +1,6 @@
 ---
 title: Base IV
-date: 7 octobre 2020
+date: 2020-10-07
 ---
 
 # Les tableaux (1/6)
diff --git a/slides/base_5.md b/slides/base_5.md
index ba443969a2911a5dd1d5d6db39926c4e372de795..a65fc7b8e1fb93e0b04b7cbb0f27bcb73cc6dc1a 100644
--- a/slides/base_5.md
+++ b/slides/base_5.md
@@ -1,6 +1,6 @@
 ---
 title: Base V
-date: 14 octobre 2020
+date: 2020-10-14
 ---
 
 # Rappel: représentation des variables en mémoire
diff --git a/slides/base_6.md b/slides/base_6.md
index 569b0f74dec220b28924f353d6fb473e05db13ab..dfa002e1027d6d8830775f58bc27d0bfbeef9ca3 100644
--- a/slides/base_6.md
+++ b/slides/base_6.md
@@ -1,6 +1,6 @@
 ---
 title: Base VI
-date: 28 octobre 2020
+date: 2020-10-28
 ---
 
 # Types énumérés
diff --git a/slides/base_7.md b/slides/base_7.md
index c29f759dd7b54ab4d962eef802967afcfa5c3399..3e2767218ebc806a682808aeb028f7300adcca0e 100644
--- a/slides/base_7.md
+++ b/slides/base_7.md
@@ -1,6 +1,6 @@
 ---
 title: Base VII
-date: 11 novembre 2020
+date: 2020-11-11
 ---
 
 # Les fichier en C
diff --git a/slides/base_X.md b/slides/base_X.md
index 25e124bd48d4401ea72015c1da2e933740ccaac5..69bffc049dd9c77bb8bafff7729ff45d91fc62c1 100644
--- a/slides/base_X.md
+++ b/slides/base_X.md
@@ -1,6 +1,6 @@
 ---
 title: Base III
-date: 2 octobre 2019
+date: 2019-10-02
 ---
 
 # Les tableaux (1/6)
diff --git a/slides/command_line.md b/slides/command_line.md
index 50fa6eb10ff92dbb9216649cb38cd25b4e6166d0..6cf376ce789ac3165de79e62da695ff6fce39da1 100644
--- a/slides/command_line.md
+++ b/slides/command_line.md
@@ -1,6 +1,6 @@
 ---
 title: Introduction à la l'interface en ligne de commande
-date: 16 septembre 2020
+date: 2020-09-16
 ---
 
 # Introduction
diff --git a/slides/delaunay.md b/slides/delaunay.md
index e1bbbe8ea30f09b7fec38b20a0ef0970181ffa83..64108484f01e5e99a84f12c6280ed3b8439bc93b 100644
--- a/slides/delaunay.md
+++ b/slides/delaunay.md
@@ -1,6 +1,6 @@
 ---
 title: Triangulation de Delaunay
-date: 19 février 2020
+date: 2020-02-19
 ---
 
 ## Généralités
diff --git a/slides/intro.md b/slides/intro.md
index d25a2194e996eed2d679c721f1a75c0d34a0c5e1..68aa44eef74ed13a6215207f53489edc0874a180 100644
--- a/slides/intro.md
+++ b/slides/intro.md
@@ -1,15 +1,15 @@
 ---
 title: Introduction générale
-date: 16 septembre 2020
+date: 2020-09-16
 ---
 
 # La hotline
 
 Nom                    Mél                               Bureau
 --------------------   ------------------------------    --------------------
-Jérémy Favre           jeremy.favre@hesge.ch      A403
+Jérémy Favre           jeremy.favre@hesge.ch             A403
 Laurent Gantel         laurent.gantel@hesge.ch           I309
-Manuel Rauscher        manuel.rauscher@hesge.ch          I305
+Phillip Geier          phillip.geier@hesge.ch            I305
 Paul Albuquerque       paul.albuquerque@hesge.ch         B410
 Orestis Malaspinas     orestis.malaspinas@hesge.ch       A401
 --------------------   ------------------------------    --------------------
diff --git a/slides/ligne_commande.md b/slides/ligne_commande.md
index 05ea73c2671cd7a4315cf77f65bba2256aae0eec..81b956ecfbacd77b59036abcb7f9296a2953c9c4 100644
--- a/slides/ligne_commande.md
+++ b/slides/ligne_commande.md
@@ -1,6 +1,6 @@
 ---
 title: La ligne de commande
-date: 16 octobre 2019
+date: 2019-10-16
 ---
 
 # Point d'entrée d'un programme
diff --git a/slides/make.md b/slides/make.md
index a708bc66224d5eebea0cdea4a8031a570c8ee909..dccb9d53aade2ebf6b3fb1abfe076c05073c1bc0 100644
--- a/slides/make.md
+++ b/slides/make.md
@@ -1,6 +1,6 @@
 ---
 title: Introduction à `make`
-date: 9 octobre 2019
+date: 2019-10-09
 ---
 
 # Introduction
diff --git a/slides/oral.md b/slides/oral.md
index b9a9317c1bb27bf61d5c2805fa9f9109026891e2..d30370199c7fcd8f1b2934c0c34beaad712b05c2 100644
--- a/slides/oral.md
+++ b/slides/oral.md
@@ -1,6 +1,6 @@
 ---
 title: Instructions pour l'oral du 11.12.2019
-date: 4 décembre 2019
+date: 2019-12-04
 ---
 
 ### Administration
diff --git a/slides/pointeurs_avances.md b/slides/pointeurs_avances.md
index 2625ed4257c58b219f2732e952fd304d887385e2..204b6dd5e5c1228beee1985b93e7b4650e905f71 100644
--- a/slides/pointeurs_avances.md
+++ b/slides/pointeurs_avances.md
@@ -1,6 +1,6 @@
 ---
 title: Pointeurs avancés
-date: 19 février 2020
+date: 2020-02-19
 ---
 
 # Pointeurs avancés
diff --git a/slides/strings.md b/slides/strings.md
index 02bf7f61a3f7e35ae7dbe5a1c1fc8711be062259..85a87eaee3c196aaafb55fd3fd53a4f284820ac1 100644
--- a/slides/strings.md
+++ b/slides/strings.md
@@ -1,6 +1,6 @@
 ---
 title: Chaînes de caractères
-date: 16 octobre 2019
+date: 2019-10-16
 ---
 
 # Rappel: le type `char`{.C}
diff --git a/slides/tests_assertions.md b/slides/tests_assertions.md
index fac9ab52c9ff2c6e164fec378fd5405334ed49e4..af31c811ec5c2ef873117ebb8e560cfbf193212c 100644
--- a/slides/tests_assertions.md
+++ b/slides/tests_assertions.md
@@ -1,6 +1,6 @@
 ---
 title: Tests unitaires et assertions
-date: 9 octobre 2019
+date: 2019-10-09
 ---
 
 # Tests unitaires