public void setTimeZone(String timeZone) {
        this.timeZone = timeZone;
    }
Sets the Java ID of the time zone to be used for all time comparisons
for this user. This ID should correspond to a value returned by
TimeZone.getAvailableIDs(). If unset or invalid, the server's local time
zone will be used.

@param timeZone
    The ID of the time zone to be used for all time comparisons, which
    should correspond to a value returned by TimeZone.getAvailableIDs().
extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-base/src/main/java/org/apache/guacamole/auth/jdbc/user/UserModel.java