diff --git a/htdocs/langs/es_ES/main.lang b/htdocs/langs/es_ES/main.lang
index acfecd8f765..3ffa490896e 100644
--- a/htdocs/langs/es_ES/main.lang
+++ b/htdocs/langs/es_ES/main.lang
@@ -598,13 +598,13 @@ Thursday=Jueves
 Friday=Viernes
 Saturday=Sábado
 Sunday=Domingo
-MondayMin=L
-TuesdayMin=M
+MondayMin=Lu
+TuesdayMin=Ma
 WednesdayMin=Mi
-ThursdayMin=J
-FridayMin=V
-SaturdayMin=S
-SundayMin=D
+ThursdayMin=Ju
+FridayMin=Vi
+SaturdayMin=Sa
+SundayMin=Do
 Day1=Lunes
 Day2=Martes
 Day3=Miércoles