HTML - Subheading / Subtitle / SupTitle / Tagline / Slogan

HTML does not have any dedicated tag for marking up:

• subheadings,
• alternative titles
• or taglines

Grouped with a header element

<header>
  <p>SuperTitle of the year</p>
  <h1>Title</h1>
  <p>Subtitle</p>
  <p>Date: Draft 9 May 2013</p>
</header>

• by a colon: the subtitle of a book is on the same line as the title separated by a colon.

<h1>The Lord of the Rings: The Two Towers</h1>

• by a inline element such as span

<h1>Ramones <br>
<span>Hey! Ho! Let’s Go</span>
</h1>

• https://www.w3.org/TR/html52/common-idioms-without-dedicated-elements.html#subheadings-subtitles-alternative-titles-and-taglines