You have two options for changing the timezone. You can do the aldo set command and specify the new timezone (make sure it's a proper time zone listed within the server's /usr/share/zoneinfo/ dir) or you can update the symlink under /var/applogic/conf/localtime. That symlink points to the current timezone file so replacing it should update your timezone settings (this is what aldo set does by the way).
Also so that you know how time syncing works on Applogic, it's as follows.
The controller servers as the grids time server so all the physical servers sync their time to it. If you look at the ntpd.conf file on the physical servers you'll see the controller's IP listed as the only time server and the controller has ntp.org's time servers listed in it's.
ntp.org <== controller <== physical servers
For BFC/3.0+:
On 3.0+ the BFC is the master NTP server that all the grid nodes will sync to. The BFC in turns syncs up to the internet or other time server. The controller will get its time from wall clock (grid node time).
See the Setting Grid Parameters article for changing the timezone on a 3.0+ grid in the BFC.
If an invalid or unresponsive (times out) NTP server is referenced the grid create will fail.
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