45)
covers time zone
data; see its VTIMEZONE calendar component.
The iCalendar format requires specialized parsers and generators; a
variant <a href="https://www.rfc-editor.org/rfc/rfc6321">xCal</a>
(Internet <abbr>RFC</abbr> 6321) uses
<a href="https://www.w3.org/XML/"><abbr
title="Extensible Markup Language">XML</abbr></a> format, and a variant
<a href="https://www.rfc-editor.org/rfc/rfc7265">jCal</a>
(Internet <abbr>RFC</abbr> 7265)
uses <a href="https://www.json.org/json-en.html"><abbr
title="JavaScript