diff --git a/TODO.md b/TODO.md
index dcfcfea..1c4cebf 100644
--- a/TODO.md
+++ b/TODO.md
@@ -3,9 +3,9 @@
 - [ ] License
 
 ## Code
-- [ ] day.js for dates
 - [ ] Nix Shell
 - [ ] Analytics
+- [ ] Organize code better
 
 ## SEO
 - [ ] Meta tags on each page
@@ -34,6 +34,7 @@
 - [ ] Bachelor project
 - [ ] Sparebank1 ActualBudget service
 - [ ] More about this website
+- [ ] RSS Feed
 
 ## ~/slashes
 - [ ] List of all slashes
diff --git a/package.json b/package.json
index e10a291..74477b2 100644
--- a/package.json
+++ b/package.json
@@ -26,6 +26,7 @@
     "@tailwindcss/vite": "^4.0.9",
     "astro": "^5.3.1",
     "astro-icon": "^1.1.5",
+    "dayjs": "^1.11.13",
     "sharp": "^0.33.5",
     "svelte": "^5.20.4",
     "tailwindcss": "^4.0.9",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 2b33e5f..25de402 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -44,6 +44,9 @@ importers:
       astro-icon:
         specifier: ^1.1.5
         version: 1.1.5
+      dayjs:
+        specifier: ^1.11.13
+        version: 1.11.13
       sharp:
         specifier: ^0.33.5
         version: 0.33.5
@@ -1444,6 +1447,9 @@ packages:
   daisyui@5.0.0-beta.8:
     resolution: {integrity: sha512-jSokqm5i+Pv1jG80wliNzMHjmcF+iMx5xRUpk0/QExVoVNyQNWeCsaWJQubPvUq7bt9nzSsQTR2uIZBoyIIoaA==}
 
+  dayjs@1.11.13:
+    resolution: {integrity: sha512-oaMBel6gjolK862uaPQOVTA7q3TZhuSvuMQAAglQDOWYO9A91IrAOUJEyKVlqJlHE0vq5p5UXxzdPfMH/x6xNg==}
+
   debug@4.3.7:
     resolution: {integrity: sha512-Er2nc/H7RrMXZBFCEim6TCmMk02Z8vLC2Rbi1KEBggpo0fS6l0S1nnapwmIi3yW/+GOJap1Krg4w0Hg80oCqgQ==}
     engines: {node: '>=6.0'}
@@ -4782,6 +4788,8 @@ snapshots:
 
   daisyui@5.0.0-beta.8: {}
 
+  dayjs@1.11.13: {}
+
   debug@4.3.7:
     dependencies:
       ms: 2.1.3
diff --git a/src/components/projects/ProjectPage.astro b/src/components/projects/ProjectPage.astro
index 2e07feb..f54a0c4 100644
--- a/src/components/projects/ProjectPage.astro
+++ b/src/components/projects/ProjectPage.astro
@@ -1,11 +1,12 @@
 ---
+import * as m from "@/paraglide/messages"
 import Layout from "@/layouts/Layout.astro"
 import BadgeList from "@/components/badge/BadgeList.astro"
 import GiteaLink from "@/components/links/GiteaLink.astro"
 import { languageTag } from "@/paraglide/runtime"
 import { getEntry, render } from "astro:content"
 import { Image } from "astro:assets"
-import * as m from "@/paraglide/messages"
+import dayjs from "dayjs"
 import "@/styles/global.css"
 
 interface Props {
@@ -26,9 +27,12 @@ const {
   createdAt,
   updatedAt,
 } = entry!.data
+
+function localeDateString(isoString: string): string {
+  return dayjs(isoString).locale(languageTag()).format("YYYY-MM-DD")
+}
 ---
 
-<!--TODO day.js / Temporal API for dates?-->
 <Layout title={title} class="mx-auto max-w-[750px]">
   <div class="flex justify-between my-2">
     <div>
@@ -37,10 +41,10 @@ const {
     </div>
     <div class="flex flex-col items-end">
       <p>
-        {m.createdAt()}: {new Date(createdAt).toLocaleDateString(languageTag())}
+        {m.createdAt()}: {localeDateString(createdAt)}
       </p>
       <p>
-        {m.updatedAt()}: {new Date(updatedAt).toLocaleDateString(languageTag())}
+        {m.updatedAt()}: {localeDateString(updatedAt)}
       </p>
     </div>
   </div>