The RME timestamp is controlled by the web server on your machine. RME timezone support info can be found at:
http://www.cisco.com/univercd/cc/td/doc/product/rtrmgmt/cw2000/rel_nt/2_1/5337_02.htm#xtocid277393
If RME receives the timezone information from the devices and is one of the supported timezones, there would be no problem here. But if the timezone received is unknown to the system, then the problem of inconsistent timezones is observed. In addition, after changing timezone configuration, it is necessary to restart all CiscoWorks applications.
Also, please use the procedures listed at the following URL to ensure timestamp configuration on the devices and client browser computer are set up correctly:
http://www.cisco.com/warp/customer/477/RME/rme_syslog.html#correct