diff --git a/example-config.yaml b/example-config.yaml
index 361a91b..a615d7e 100644
--- a/example-config.yaml
+++ b/example-config.yaml
@@ -14,7 +14,7 @@ cache:
 blogs:
   main:
     path: /
-    lang: en
+    lang: en_US
     title: My blog
     description: This is my blog
     sections:
diff --git a/go.mod b/go.mod
index 1d5f305..4617e72 100644
--- a/go.mod
+++ b/go.mod
@@ -8,6 +8,7 @@ require (
 	github.com/araddon/dateparse v0.0.0-20201001162425-8aadafed4dc4
 	github.com/caddyserver/certmagic v0.12.0
 	github.com/go-chi/chi v4.1.2+incompatible
+	github.com/goodsign/monday v1.0.1-0.20201007115131-c065b60ec611
 	github.com/gopherjs/gopherjs v0.0.0-20200217142428-fce0ec30dd00 // indirect
 	github.com/gorilla/feeds v1.1.1
 	github.com/jeremywohl/flatten v1.0.1
diff --git a/go.sum b/go.sum
index ad40864..e335ee3 100644
--- a/go.sum
+++ b/go.sum
@@ -84,6 +84,8 @@ github.com/golang/mock v1.3.1/go.mod h1:sBzyDLLjw3U8JLTeZvSv8jJB+tU5PVekmnlKIyFU
 github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 github.com/golang/protobuf v1.3.2/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
+github.com/goodsign/monday v1.0.1-0.20201007115131-c065b60ec611 h1:uZeRJDvu+pkGLY0AGGQzJr7FRsagVd5+Sf7d7mRRx54=
+github.com/goodsign/monday v1.0.1-0.20201007115131-c065b60ec611/go.mod h1:r4T4breXpoFwspQNM+u2sLxJb2zyTaxVGqUfTBjWOu8=
 github.com/google/btree v0.0.0-20180813153112-4030bb1f1f0c/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
 github.com/google/btree v1.0.0/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
 github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
diff --git a/render.go b/render.go
index 417450a..9483950 100644
--- a/render.go
+++ b/render.go
@@ -12,6 +12,7 @@ import (
 	"time"
 
 	"github.com/araddon/dateparse"
+	"github.com/goodsign/monday"
 )
 
 const templatesDir = "templates"
@@ -65,6 +66,14 @@ func initRendering() error {
 			}
 			return d.Format(format)
 		},
+		"longDate": func(date string, localeString string) string {
+			d, err := dateparse.ParseIn(date, time.Local)
+			if err != nil {
+				return ""
+			}
+			ml := monday.Locale(localeString)
+			return monday.Format(d, monday.LongFormatsByLocale[ml], ml)
+		},
 		"asset":  assetFile,
 		"string": getTemplateStringVariant,
 		"include": func(templateName string, blog *configBlog, data interface{}) (template.HTML, error) {
diff --git a/templates/photosummary.gohtml b/templates/photosummary.gohtml
index 34d33a5..7c2f81a 100644
--- a/templates/photosummary.gohtml
+++ b/templates/photosummary.gohtml
@@ -1,7 +1,7 @@
 {{ define "photosummary" }}
   <article>
       {{ with p .Data "title" }}<h2>{{ . }}</h2>{{ end }}
-      {{ with .Data.Published }}<p>{{ dateformat . "02. Jan 2006" }}</p>{{ end }}
+      {{ if .Data.Published }}<p>{{ longDate .Data.Published .Blog.Lang }}</p>{{ end }}
       {{ range $i, $photo := ( ps .Data .Blog.Photos.Parameter ) }}
           {{ md ( printf "![](%s)" $photo ) }}
       {{ end }}
diff --git a/templates/post.gohtml b/templates/post.gohtml
index 637dd6b..a8ff606 100644
--- a/templates/post.gohtml
+++ b/templates/post.gohtml
@@ -7,9 +7,9 @@
     <article>
         {{ with title .Data }}<h1 class=p-name>{{ . }}</h1>{{ end }}
         {{ if .Data.Published }}
-        <p>{{ string .Blog.Lang "publishedon" }} {{ dateformat .Data.Published "02. Jan 2006" }}</p>{{ end }}
+        <p>{{ string .Blog.Lang "publishedon" }} {{ longDate .Data.Published .Blog.Lang }}</p>{{ end }}
         {{ if .Data.Updated }}
-        <p>{{ string .Blog.Lang "updatedon" }} {{ dateformat .Data.Updated "02. Jan 2006" }}</p>{{ end }}
+        <p>{{ string .Blog.Lang "updatedon" }} {{ longDate .Data.Updated .Blog.Lang }}</p>{{ end }}
         {{ with .Data.Content }}
           <div class=e-content>{{ md . }}</div>
         {{ end }}
diff --git a/templates/strings/de.yaml b/templates/strings/de_DE.yaml
similarity index 100%
rename from templates/strings/de.yaml
rename to templates/strings/de_DE.yaml
diff --git a/templates/summary.gohtml b/templates/summary.gohtml
index c80fd10..89b8ba0 100644
--- a/templates/summary.gohtml
+++ b/templates/summary.gohtml
@@ -1,7 +1,7 @@
 {{ define "summary" }}
   <article>
       {{ with p .Data "title" }}<h2>{{ . }}</h2>{{ end }}
-      {{ with .Data.Published }}<p>{{ dateformat . "02. Jan 2006" }}</p>{{ end }}
+      {{ if .Data.Published }}<p>{{ longDate .Data.Published .Blog.Lang }}</p>{{ end }}
     <p>{{ summary .Data }}</p>
     <a href="{{ .Data.Path }}">{{ string .Blog.Lang "view" }}</a>
   </article>