diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7d934ef50e4a40f440f91303d5524f6e655a7a60..1766e583a494486bc5a23de4c6f6651f4aaa6cfa 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -331,8 +331,8 @@ if(NOT DEFINED SERVICE_GROUP)
 endif()
 configure_file(unit/biboumi.service.cmake biboumi.service)
 
-# The date MUST be in english format
-set(ENV{LANG} "en_US.utf-8")
+# Force the format of the date output
+set(ENV{LANG} "C.UTF-8")
 execute_process(COMMAND "date" "+%a %b %d %Y" OUTPUT_VARIABLE RPM_DATE
                 OUTPUT_STRIP_TRAILING_WHITESPACE)
 unset(ENV{LANG})
diff --git a/louloulibs/utils/time.cpp b/louloulibs/utils/time.cpp
index e3c49ed9fb92226927697b6b08d058a6805d6dd0..d9c4381c52ea609789a203aaa7ac234374949087 100644
--- a/louloulibs/utils/time.cpp
+++ b/louloulibs/utils/time.cpp
@@ -24,7 +24,7 @@ std::time_t parse_datetime(const std::string& stamp)
   std::tm t = {};
 #ifdef HAS_GET_TIME
   std::istringstream ss(stamp);
-  ss.imbue(std::locale("en_US.UTF-8"));
+  ss.imbue(std::locale("C.UTF-8"));
 
   std::string timezone;
   ss >> std::get_time(&t, format) >> timezone;