diff --git a/exampleSite/config.yaml b/exampleSite/config.yaml
index 87ba743..d896021 100644
--- a/exampleSite/config.yaml
+++ b/exampleSite/config.yaml
@@ -164,7 +164,7 @@ params:
   yearFormat: "2006"
   monthFormat: "01-02"
   dateFormat: "2006-01-02"
-  timeFormat: "2006-01-02T15:04:05-07:00"
+  timeFormat: "2006-01-02 15:04:05 -07:00"
 
   # 页面模式
   # Schemes
diff --git a/layouts/partials/_funs/cal_siteinfo.html b/layouts/partials/_funs/cal_siteinfo.html
index b1fe5ab..2f0f714 100644
--- a/layouts/partials/_funs/cal_siteinfo.html
+++ b/layouts/partials/_funs/cal_siteinfo.html
@@ -1,3 +1,4 @@
+{{/** Calculate some information for site operation **/}}
 {{ $scratch := newScratch }}
 {{ $pages := (where .Page.Site.RegularPages "Section" "in" .Site.Params.mainSections).ByLastmod.Reverse }}
 
@@ -7,10 +8,11 @@
 {{ end }}
 
 {{ range first 1 $pages }}
-  {{ $scratch.Set "first" (time.Format .Site.Params.timeFormat .Date) }}
+  {{ $lastMod := default .Date .Lastmod }}
+  {{ $scratch.Set "first" $lastMod }}
 {{ end }}
 {{ range last 1 $pages }}
-  {{ $scratch.Set "last" (time.Format .Site.Params.timeFormat .Date) }}
+  {{ $scratch.Set "last" .Date }}
 {{ end }}
 
 {{ return $scratch }}
\ No newline at end of file
diff --git a/layouts/partials/post/header_meta/created_date.html b/layouts/partials/post/header_meta/created_date.html
index a1aa316..2c3945f 100644
--- a/layouts/partials/post/header_meta/created_date.html
+++ b/layouts/partials/post/header_meta/created_date.html
@@ -1,6 +1,6 @@
 {{ if .Site.Params.postMeta.created }}
-{{ $timeF := .Site.Params.timeFormat }}
-{{ $createdTime := (.Date.Format $timeF) | default (.Date.Format $timeF) }}
+{{ $createdDate := .Date.Format .Site.Params.dateFormat }}
+{{ $createdTime := .Date.Format .Site.Params.timeFormat }}
 <span class="post-meta-item">
   <span class="post-meta-item-icon">
     <i class="fas fa-solid fa-calendar"></i>
@@ -8,8 +8,8 @@
   <span class="post-meta-item-text" title="{{ T "PostMeta.publish.date" }}">
     {{ print (T "PostMeta.publish.date") (T "Symbol.colon") }}
   </span>
-  <time title="{{ print (T "PostMeta.publish.time") (T "Symbol.colon") }}{{ .Date }}" itemprop="dateCreated datePublished" datetime="{{ .Date }}">
-    {{ .Date.Format .Site.Params.dateFormat }}
+  <time title="{{ print (T "PostMeta.publish.time") (T "Symbol.colon") }}{{ $createdTime }}" itemprop="dateCreated datePublished" datetime="{{ .Date }}">
+    {{ $createdDate }}
   </time>
 </span>
 {{ end }}
\ No newline at end of file
diff --git a/layouts/partials/post/header_meta/update_date.html b/layouts/partials/post/header_meta/update_date.html
index 6e21c46..9b33359 100644
--- a/layouts/partials/post/header_meta/update_date.html
+++ b/layouts/partials/post/header_meta/update_date.html
@@ -1,5 +1,6 @@
 {{ if and .Site.Params.postMeta.updated.enable .Site.Params.postMeta.updated.anotherDay }}
 {{ if and .Lastmod (gt .Lastmod .Date) }}
+{{ $modDate := .Lastmod.Format .Site.Params.dateFormat }}
 {{ $modTime := .Lastmod.Format .Site.Params.timeFormat }}
 <span class="post-meta-item">
   <span class="post-meta-item-icon">
@@ -8,7 +9,9 @@
   <span class="post-meta-item-text" title="{{ T "PostMeta.lastmod.date" }}">
     {{ print (T "PostMeta.lastmod.date") (T "Symbol.colon") }}
   </span>
-  <time title="{{ print (T "PostMeta.lastmod.time") (T "Symbol.colon") }}{{ $modTime }}" itemprop="dateModified" datetime="{{ $modTime }}">{{ .Lastmod.Format .Site.Params.dateFormat }}</time>
+  <time title="{{ print (T "PostMeta.lastmod.time") (T "Symbol.colon") }}{{ $modTime }}" itemprop="dateModified dateLastmod" datetime="{{ .Lastmod }}">
+    {{ $modDate }}
+  </time>
 </span>
 {{ end }}
 {{ end }}
\ No newline at end of file