diff --git a/.gitlab-ci/container/build-angle.sh b/.gitlab-ci/container/build-angle.sh
index deaeffeff13..b47637c6c9d 100644
--- a/.gitlab-ci/container/build-angle.sh
+++ b/.gitlab-ci/container/build-angle.sh
@@ -30,7 +30,7 @@ angle_patch_files=(
 )
 for patch in "${angle_patch_files[@]}"; do
   echo "Apply patch to ANGLE from ${patch}"
-  GIT_COMMITTER_DATE=$(date -d@0) git am < "${ANGLE_PATCH_DIR}/${patch}"
+  GIT_COMMITTER_DATE="$(LC_TIME=C date -d@0)" git am < "${ANGLE_PATCH_DIR}/${patch}"
 done
 
 {
diff --git a/.gitlab-ci/container/build-deqp.sh b/.gitlab-ci/container/build-deqp.sh
old mode 100644
new mode 100755
index eb4bab7ee69..838c747a751
--- a/.gitlab-ci/container/build-deqp.sh
+++ b/.gitlab-ci/container/build-deqp.sh
@@ -133,14 +133,14 @@ do
   PATCH_URL="https://github.com/KhronosGroup/VK-GL-CTS/commit/$commit.patch"
   echo "Apply patch to ${DEQP_API} CTS from $PATCH_URL"
   curl -L --retry 4 -f --retry-all-errors --retry-delay 60 $PATCH_URL | \
-    GIT_COMMITTER_DATE=$(date -d@0) git am -
+    GIT_COMMITTER_DATE=$(LC_TIME=C date -d@0) git am -
 done
 
 cts_patch_files="${prefix}_cts_patch_files[@]"
 for patch in "${!cts_patch_files}"
 do
   echo "Apply patch to ${DEQP_API} CTS from $patch"
-  GIT_COMMITTER_DATE=$(date -d@0) git am < $OLDPWD/.gitlab-ci/container/patches/$patch
+  GIT_COMMITTER_DATE=$(LC_TIME=C date -d@0) git am < $OLDPWD/.gitlab-ci/container/patches/$patch
 done
 
 {