notes for dates and tags

FROM tags original : 


{% assign date_format = site.date_format | default: "%B %-d, %Y" %}

{%- capture site_tags -%}
    {%- for tag in site.tags -%}
        {{- tag | first -}}{%- unless forloop.last -%},{%- endunless -%}
    {%- endfor -%}
{%- endcapture -%}
{%- assign tags_list = site_tags | split:',' | sort -%}

{%- for tag in tags_list -%}
    <a href="#{{- tag -}}" class="btn btn-primary tag-btn my-5"><i class="fas fa-tag" aria-hidden="true"></i>&nbsp;{{- tag -}}&nbsp;({{site.tags[tag].size}})</a>
{%- endfor -%}

<div id="full-tags-list my-5">
{%- for tag in tags_list -%}
    <h2 id="{{- tag -}}" class="linked-section">
        <i class="fas fa-tag" aria-hidden="true"></i>
        &nbsp;{{- tag -}}&nbsp;({{site.tags[tag].size}})
    </h2>
    <div class="post-list">
        {%- for post in site.tags[tag] -%}
            <div class="tag-entry">
                <a href="{{ post.url | relative_url }}">{{- post.title -}}</a>
                <div class="entry-date">
                    <time datetime="{{- post.date | date_to_xmlschema -}}">{{- post.date | date: date_format -}}</time>
                </div>
            </div>
        {%- endfor -%}
    </div>
{%- endfor -%}
</div>


From home (DAtes): 

 <p class='h1 my-4'>Browse by Date</p>

  {% for post in site.posts %}
  {% assign currentdate = post.date | date: "%Y" %}
  {% if currentdate != date %}
    {% unless forloop.first %}</ul>{% endunless %}
    <h1 id="y{{post.date | date: "%Y"}}">{{ currentdate }}</h1>
    <ul>
    {% assign date = currentdate %}
  {% endif %}
    <li><a href="{{ post.url }}">{{ post.title }}</a></li>
  {% if forloop.last %}</ul>{% endif %}
{% endfor %}