Zend_TimeSync is able to receive internet or network time from a time
server using the NTP or SNTP protocol.
With Zend_TimeSync, Zend Framework is able to act independently from
the time settings of the server where it is running.
To be independent from the actual time of the server, Zend_TimeSync
works with the difference of the real time which is sent through NTP or SNTP and the
internal server's time.
Background
Zend_TimeSync is not able to change the server's time, but it
will return a Zend_Date instance from
which the difference from the server's time can be worked with.