diff --git a/nijigen/article-list.ftl b/nijigen/article-list.ftl
index d0668dd..6ce5585 100644
--- a/nijigen/article-list.ftl
+++ b/nijigen/article-list.ftl
@@ -22,7 +22,7 @@
     <article class="item <#if article_index &lt; 3>item--active</#if>">
         <time class="tooltipped tooltipped__n item__date"
               aria-label="${article.articleCreateDate?string("yyyy")}年">
-            ${article.articleCreateDate?string("m")}月
+            ${article.articleCreateDate?string("MM")}月
             <span class="item__day">${article.articleCreateDate?string("dd")}</span>
         </time>
 
diff --git a/nijigen/article.ftl b/nijigen/article.ftl
index 32d26e2..79e6319 100644
--- a/nijigen/article.ftl
+++ b/nijigen/article.ftl
@@ -56,7 +56,7 @@
         <div class="item item--active">
             <time class="tooltipped tooltipped__n item__date"
                   aria-label="${article.articleCreateDate?string("yyyy")}年">
-            ${article.articleCreateDate?string("m")}月
+            ${article.articleCreateDate?string("MM")}月
                 <span class="item__day">${article.articleCreateDate?string("dd")}</span>
             </time>