diff --git a/tpl/tplimpl/embedded/templates.autogen.go b/tpl/tplimpl/embedded/templates.autogen.go
index 21b035edd5d..99adf292f1d 100644
--- a/tpl/tplimpl/embedded/templates.autogen.go
+++ b/tpl/tplimpl/embedded/templates.autogen.go
@@ -212,8 +212,8 @@ if (!doNotTrack) {
 {{- if .IsPage }}
 {{- $iso8601 := "2006-01-02T15:04:05-07:00" -}}
 <meta property="article:section" content="{{ .Section }}" />
-{{ with .PublishDate }}<meta property="article:published_time" content="{{ .PublishDate.Format $iso8601 }}" />{{ end }}
-{{ with .Lastmod }}<meta property="article:modified_time" content="{{ .Lastmod.Format $iso8601 }}" />{{ end }}
+{{ with .PublishDate }}<meta property="article:published_time" content="{{ .Format $iso8601 }}" />{{ end }}
+{{ with .Lastmod }}<meta property="article:modified_time" content="{{ .Format $iso8601 }}" />{{ end }}
 
 {{- range .Site.Authors }}
 {{ with .Social.facebook }}<meta property="article:author" content="https://www.facebook.com/{{ . }}" />{{ end }}
@@ -295,8 +295,8 @@ if (!doNotTrack) {
 
 {{- if .IsPage -}}
 {{- $iso8601 := "2006-01-02T15:04:05-07:00" -}}
-{{ with .PublishDate }}<meta itemprop="datePublished" content="{{ .PublishDate.Format $iso8601 }}" />{{ end}}
-{{ with .Lastmod }}<meta itemprop="dateModified" content="{{ .Lastmod.Format $iso8601 }}" />{{ end}}
+{{ with .PublishDate }}<meta itemprop="datePublished" content="{{ .Format $iso8601 }}" />{{ end}}
+{{ with .Lastmod }}<meta itemprop="dateModified" content="{{ .Format $iso8601 }}" />{{ end}}
 <meta itemprop="wordCount" content="{{ .WordCount }}">
 
 {{- with $.Params.images -}}
diff --git a/tpl/tplimpl/embedded/templates/opengraph.html b/tpl/tplimpl/embedded/templates/opengraph.html
index 199b9b58db7..5d4e78d7d01 100644
--- a/tpl/tplimpl/embedded/templates/opengraph.html
+++ b/tpl/tplimpl/embedded/templates/opengraph.html
@@ -19,8 +19,8 @@
 {{- if .IsPage }}
 {{- $iso8601 := "2006-01-02T15:04:05-07:00" -}}
 <meta property="article:section" content="{{ .Section }}" />
-{{ with .PublishDate }}<meta property="article:published_time" content="{{ .PublishDate.Format $iso8601 }}" />{{ end }}
-{{ with .Lastmod }}<meta property="article:modified_time" content="{{ .Lastmod.Format $iso8601 }}" />{{ end }}
+{{ with .PublishDate }}<meta property="article:published_time" content="{{ .Format $iso8601 }}" />{{ end }}
+{{ with .Lastmod }}<meta property="article:modified_time" content="{{ .Format $iso8601 }}" />{{ end }}
 
 {{- range .Site.Authors }}
 {{ with .Social.facebook }}<meta property="article:author" content="https://www.facebook.com/{{ . }}" />{{ end }}
diff --git a/tpl/tplimpl/embedded/templates/schema.html b/tpl/tplimpl/embedded/templates/schema.html
index 6edef5fc47c..772c6c2b19d 100644
--- a/tpl/tplimpl/embedded/templates/schema.html
+++ b/tpl/tplimpl/embedded/templates/schema.html
@@ -3,8 +3,8 @@
 
 {{- if .IsPage -}}
 {{- $iso8601 := "2006-01-02T15:04:05-07:00" -}}
-{{ with .PublishDate }}<meta itemprop="datePublished" content="{{ .PublishDate.Format $iso8601 }}" />{{ end}}
-{{ with .Lastmod }}<meta itemprop="dateModified" content="{{ .Lastmod.Format $iso8601 }}" />{{ end}}
+{{ with .PublishDate }}<meta itemprop="datePublished" content="{{ .Format $iso8601 }}" />{{ end}}
+{{ with .Lastmod }}<meta itemprop="dateModified" content="{{ .Format $iso8601 }}" />{{ end}}
 <meta itemprop="wordCount" content="{{ .WordCount }}">
 
 {{- with $.Params.images -}}