emctl resetTZ agentTZ

rac1-> emctl resetTZ agentTZ
set to US/EasternOracle Enterprise Manager 10g Database Control Release 10.2.0.4.0Copyright (c) 1996, 2007 Oracle Corporation. All rights reserved.Updating /u01/app/oracle/product/10.2.0/db_1/rac1_devdb1/sysman/config/emd.properties...Time zone set to US/Eastern.
To complete this process, you must either:
connect to the database served by this DBConsole as user 'sysman', and execute:
SQL> exec mgmt_target.set_agent_tzrgn('rac1.mycorpdomain.com:3938','US/Eastern')
-- or --
connect to the database served by this DBConsole as user 'sys', and execute:
SQL> alter session set current_schema = SYSMAN;SQL> exec mgmt_target.set_agent_tzrgn('rac1.mycorpdomain.com:3938','US/Eastern')

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rac1-> sqlplus / as sysdba
SQL*Plus: Release 10.2.0.3.0 - Production on Fri May 9 17:27:37 2008
Copyright (c) 1982, 2006, Oracle. All Rights Reserved.
Connected to:Oracle Database 10g Enterprise Edition Release 10.2.0.3.0 - ProductionWith the Partitioning, Real Application Clusters, OLAP and Data Mining options
SQL> alter session set current_schema = SYSMAN;
Session altered.
SQL> exec mgmt_target.set_agent_tzrgn('rac1.mycorpdomain.com:3938','US/Eastern')
PL/SQL procedure successfully completed.
SQL>
rac1-> emctl start dbconsole devdb1TZ set to US/EasternOracle Enterprise Manager 10g Database Control Release 10.2.0.3.0Copyright (c) 1996, 2006 Oracle Corporation. All rights reserved.http://rac1.mycorpdomain.com:1158/em/console/aboutApplicationStarting Oracle Enterprise Manager 10g Database Control ............................. started
Logs are generated in directory /u01/app/oracle/product/10.2.0/db_1/rac1_devdb1/sysman/log