diff --git a/DOCUMENTATION/content/documentation/index.md b/DOCUMENTATION/content/documentation/index.md
index 399db68e..1e8f6c5b 100644
--- a/DOCUMENTATION/content/documentation/index.md
+++ b/DOCUMENTATION/content/documentation/index.md
@@ -1500,6 +1500,13 @@ To add locales to the container:
 
 4 - Check enabled locales with `docker-compose exec php-fpm locale -a`
 
+Update the locale setting, default is `POSIX`
+
+1 - Open the `.env` file and set `PHP_FPM_DEFAULT_LOCALE` to `en_US.UTF8` or other locale you want.
+
+2 - Re-build your PHP-FPM Container `docker-compose build php-fpm`.
+
+3 - Check the default locale with `docker-compose exec php-fpm locale`
 
 
 <br>
diff --git a/docker-compose.yml b/docker-compose.yml
index 7c469df4..fc73a321 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -212,6 +212,7 @@ services:
           - INSTALL_XHPROF=${PHP_FPM_INSTALL_XHPROF}
           - PUID=${PHP_FPM_PUID}
           - PGID=${PHP_FPM_PGID}
+          - LOCALE=${PHP_FPM_DEFAULT_LOCALE}
           - http_proxy
           - https_proxy
           - no_proxy
diff --git a/env-example b/env-example
index d5388433..e6ee7989 100644
--- a/env-example
+++ b/env-example
@@ -206,6 +206,7 @@ PHP_FPM_INSTALL_SSHPASS=false
 PHP_FPM_INSTALL_MAILPARSE=false
 PHP_FPM_FFMPEG=false
 PHP_FPM_ADDITIONAL_LOCALES="es_ES.UTF-8 fr_FR.UTF-8"
+PHP_FPM_DEFAULT_LOCALE=POSIX
 
 PHP_FPM_PUID=1000
 PHP_FPM_PGID=1000
diff --git a/php-fpm/Dockerfile b/php-fpm/Dockerfile
index 042341f3..3333114f 100644
--- a/php-fpm/Dockerfile
+++ b/php-fpm/Dockerfile
@@ -835,6 +835,10 @@ RUN if [ ${INSTALL_FAKETIME} = true ]; then \
     echo "/usr/lib/x86_64-linux-gnu/faketime/libfaketime.so.1" > /etc/ld.so.preload \
 ;fi
 
+# Configure locale.
+ARG LOCALE=POSIX
+ENV LC_ALL ${LOCALE}
+
 WORKDIR /var/www
 
 CMD ["php-fpm"]