</abbr> 8601 that is in common use in <abbr>XML</abbr> data.</li>
<li><a href="https://www.rfc-editor.org/rfc/rfc5322#section-3.3">§3.3 of
Internet Message Format</a> (Internet <abbr>RFC</abbr> 5322)
specifies the time notation used in email and <a
href="https://en.wikipedia.org/wiki/Hypertext_Transfer_Protocol"><abbr>HTTP</abbr></a>
headers.</li>
<li>
<a href="https://www.rfc-editor.org/rfc/rfc3339">Date and Time
on the Internet: Timestamps</a> (Internet <abbr>RFC</abbr> 3339)
specifies an <abbr>ISO</abbr