Region and Time Zone Considerations
Amazon EC2 is hosted in multiple locations worldwide, and these locations are composed of regions and availability zones. Each region is a separate geographic area and has multiple, isolated locations known as availability zones. When launching an instance, you can use the EC2 VPC Console to create a new subnet or select No preference to allow AWS to select the best subnet in any availability zone. Teradata recommends using subnets especially if you want to launch Teradata Database MPP instances.
By default, the time zone for Teradata Database instances on AWS is set based on the region you choose when you launch your instance. For example, if you launch an instance using the U.S. West region, instances are in the Pacific time zone. You have the option to change the operating system time zone when you launch the Teradata Database instance.
Teradata Data Mover, Teradata Data Stream Controller, Teradata Viewpoint, and Teradata REST Services default to the same availability zone as the Database instance.
Teradata Server Management and Teradata Ecosystem Manager time zones default to UTC and cannot be changed.
For more information on changing the time zone on an instance or using regions and availability zones, see Amazon User Guide for Linux Instances.