diff --git a/.eleventy.js b/.eleventy.js
index a7202875..7181fd28 100644
--- a/.eleventy.js
+++ b/.eleventy.js
@@ -71,7 +71,7 @@ module.exports = function(eleventyConfig) {
     });
 
     eleventyConfig.addFilter("postDate", (dateObj) => {
-        return DateTime.fromJSDate(dateObj).toLocaleString(DateTime.DATE_FULL);
+        return DateTime.fromJSDate(dateObj).toFormat('d MMMM yyyy');
     });
 
     // Used for tag page generation
diff --git a/Dockerfile b/Dockerfile
index 055a0f97..1a1b52d9 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,9 +3,12 @@ FROM node:20.11.1-alpine AS build
 COPY . .
 
 RUN apk update && apk upgrade && \
-    apk add --no-cache git
+    apk add --no-cache git tzdata
 
-ENV SITE_ROOT "https://engineering.homeoffice.gov.uk/"
+RUN ln -s /usr/share/zoneinfo/Europe/London /etc/localtime
+
+ENV SITE_ROOT="https://engineering.homeoffice.gov.uk/" \
+    LANG="en_GB.UTF-8"
 
 RUN npm ci --omit=dev
 RUN npm run build
diff --git a/package-lock.json b/package-lock.json
index 67d45861..80529e31 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -10,7 +10,8 @@
       "license": "MIT",
       "dependencies": {
         "@11ty/eleventy": "^2.0.1",
-        "@x-govuk/govuk-eleventy-plugin": "^6.1.0"
+        "@x-govuk/govuk-eleventy-plugin": "^6.1.0",
+        "luxon": "^3.4.4"
       },
       "devDependencies": {
         "axe-core": "^4.8.4",
@@ -3108,9 +3109,9 @@
       "integrity": "sha512-Tpp60P6IUJDTuOq/5Z8cdskzJujfwqfOTkrwIwj7IRISpnkJnT6SyJ4PCPnGMoFjC9ddhal5KVIYtAt97ix05A=="
     },
     "node_modules/follow-redirects": {
-      "version": "1.15.5",
-      "resolved": "https://registry.npmjs.org/follow-redirects/-/follow-redirects-1.15.5.tgz",
-      "integrity": "sha512-vSFWUON1B+yAw1VN4xMfxgn5fTUiaOzAJCKBwIIgT/+7CuGy9+r+5gITvP62j3RmaD5Ph65UaERdOSRGUzZtgw==",
+      "version": "1.15.6",
+      "resolved": "https://registry.npmjs.org/follow-redirects/-/follow-redirects-1.15.6.tgz",
+      "integrity": "sha512-wWN62YITEaOpSK584EZXJafH1AGpO8RVgElfkuXbTOrPX4fIfOyEpW/CsiNd8JdYrAoOvafRTOEnvsO++qCqFA==",
       "funding": [
         {
           "type": "individual",
@@ -4365,9 +4366,9 @@
       }
     },
     "node_modules/luxon": {
-      "version": "3.3.0",
-      "resolved": "https://registry.npmjs.org/luxon/-/luxon-3.3.0.tgz",
-      "integrity": "sha512-An0UCfG/rSiqtAIiBPO0Y9/zAnHUZxAMiCpTd5h2smgsj7GGmcenvrvww2cqNA8/4A5ZrD1gJpHN2mIHZQF+Mg==",
+      "version": "3.4.4",
+      "resolved": "https://registry.npmjs.org/luxon/-/luxon-3.4.4.tgz",
+      "integrity": "sha512-zobTr7akeGHnv7eBOXcRgMeCP6+uyYsczwmeRCauvpvaAltgNyTbLH/+VaEAPUeWBT+1GuNmz4wC/6jtQzbbVA==",
       "engines": {
         "node": ">=12"
       }
@@ -9234,9 +9235,9 @@
       }
     },
     "follow-redirects": {
-      "version": "1.15.5",
-      "resolved": "https://registry.npmjs.org/follow-redirects/-/follow-redirects-1.15.5.tgz",
-      "integrity": "sha512-vSFWUON1B+yAw1VN4xMfxgn5fTUiaOzAJCKBwIIgT/+7CuGy9+r+5gITvP62j3RmaD5Ph65UaERdOSRGUzZtgw==",
+      "version": "1.15.6",
+      "resolved": "https://registry.npmjs.org/follow-redirects/-/follow-redirects-1.15.6.tgz",
+      "integrity": "sha512-wWN62YITEaOpSK584EZXJafH1AGpO8RVgElfkuXbTOrPX4fIfOyEpW/CsiNd8JdYrAoOvafRTOEnvsO++qCqFA==",
       "optional": true
     },
     "foreground-child": {
@@ -10145,9 +10146,9 @@
       "integrity": "sha512-65/Jky17UwSb0BuB9V+MyDpsOtXKmYwzhyl+cOa9XUiI4uV2Ouy/2voFP3+al0BjZbJgMBD8FojMpAf+Z+qn4A=="
     },
     "luxon": {
-      "version": "3.3.0",
-      "resolved": "https://registry.npmjs.org/luxon/-/luxon-3.3.0.tgz",
-      "integrity": "sha512-An0UCfG/rSiqtAIiBPO0Y9/zAnHUZxAMiCpTd5h2smgsj7GGmcenvrvww2cqNA8/4A5ZrD1gJpHN2mIHZQF+Mg=="
+      "version": "3.4.4",
+      "resolved": "https://registry.npmjs.org/luxon/-/luxon-3.4.4.tgz",
+      "integrity": "sha512-zobTr7akeGHnv7eBOXcRgMeCP6+uyYsczwmeRCauvpvaAltgNyTbLH/+VaEAPUeWBT+1GuNmz4wC/6jtQzbbVA=="
     },
     "magic-string": {
       "version": "0.27.0",
diff --git a/package.json b/package.json
index 58618e8d..ee7235c5 100644
--- a/package.json
+++ b/package.json
@@ -30,7 +30,8 @@
   },
   "dependencies": {
     "@11ty/eleventy": "^2.0.1",
-    "@x-govuk/govuk-eleventy-plugin": "^6.1.0"
+    "@x-govuk/govuk-eleventy-plugin": "^6.1.0",
+    "luxon": "^3.4.4"
   },
   "devDependencies": {
     "axe-core": "^4.8.4",