擅长:python、mysql、java
<p>这显然是POSIX的事情。来自<a href="http://en.wikipedia.org/wiki/Tz_database">Wikipedia</a>:</p>
<blockquote>
<p>In order to conform with the POSIX style, those zones beginning with "Etc/GMT" have their sign reversed from what most people expect. In this style, zones west of GMT have a positive sign and those east have a negative sign.</p>
</blockquote>