BPA Start date time zone

Summary:

How I can control the BPA start date time zone?

Content (required):

We can define date BPA start date in BPA header but we cannot define the time, we wants to know if the BPA effective at 00:00 in which time zone?

Version (include the version you are using, if applicable):

23B

Code Snippet (add any code snippets that support your topic, if applicable):

BPA