As an admin of a mature Marketo Org, it would be extremely helpful to be able to specify what time zone date fields are adhering to when creating lists or global administration campaigns. They can adhere to the instance-wide setting unless you specifically manually change it. I know I can change my personal user timezone, but date fields in lists and campaigns still adhere to the instance-wide timezone setting. It makes it difficult, if not impossible, to filter on date fields for time zones that are not the same as your instance setting.
As a use case: we're creating a local data mart of Marketo data, and when we pull it using API, it's in GMT/ZULU format. It's not possible to compare this exported list of people against Marketo's GUI without changing the instance-wide timezone to match.
Alternatively, allow us to perform date calculations.
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