modify : cotes2020/jekyll-theme-chirpy#2295

Author: yokoyama-midori

_layouts/archives.html

@@ -0,0 +1,36 @@
+---
+layout: page
+# The Archives of posts.
+---
+
+{% include lang.html %}
+
+{% assign df_strftime_m = site.data.locales[lang].df.archives.strftime | default: '/ %m' %}
+{% assign df_dayjs_m = site.data.locales[lang].df.archives.dayjs | default: '/ MM' %}
+
+<div id="archives" class="pl-xl-3">
+    {% for post in site.posts %}
+    {% assign cur_year = post.date | date: '%Y' %}
+
+    {% if cur_year != last_year %}
+    {% unless forloop.first %}</ul>{% endunless %}
+
+    <time class="year lead d-block">{{ cur_year }}</time>
+    {{ '<ul class="list-unstyled">' }}
+
+        {% assign last_year = cur_year %}
+        {% endif %}
+
+        <li>
+            {% assign ts = post.date | date: '%s' %}
+            <span class="date day" data-ts="{{ ts }}" data-df="MM / DD">{{ post.date | date: '%m / %d' }}</span>
+            <!--span class="date month small text-muted ms-1" data-ts="{{ ts }}" data-df="{{ df_dayjs_m }}">
+        {{ post.date | date: df_strftime_m }}
+      </span-->
+            <a href="{{ post.url | relative_url }}">{{ post.title }}</a>
+        </li>
+
+        {% if forloop.last %}
+    </ul>{% endif %}
+    {% endfor %}
+</div>