Prior to 21.2.1 Automation would automatically use the timezone set at the Company Level. This functionality was fine for the majority of accounts within a single timezone, but was lacking for accounts with Yards located in different timezones (i.e Queensland, WA, NSW, Victoria etc).
The Automation screen now has a Timezone field that will default to the Timezone set up at the Company level. All existing Automation records are defaulted to the Company Timezone. If the account you are setting up Automation for has Yards with multiple Timezones you MUST set up multiple Automation records - each with their own timezone (Note - Automation will NOT pick up the Yard level. It must be set within each Automation setting).
The Timezone set here controls the Blackout Periods.