.visualstudio.com">Visual
Studio Code</a>.
</p>
<p>
For further information about updates, please see
<a href="https://www.rfc-editor.org/rfc/rfc6557">Procedures for
Maintaining the Time Zone Database</a> (Internet <abbr>RFC</abbr> 6557).
More detail can be
found in <a href="theory.html">Theory and pragmatics of the
<code><abbr>tz</abbr></code> code and data</a>.
<a href="https://a0.github.io/a0-tzmigration/">A0 TimeZone Migration</a>
displays changes between recent <code><abbr>tzdb</abbr></code> versions.
