Why does my QBO use PST when my computer is on Easter Time?

https://quickbooks.intuit.com/learn-support/en-us/employees-and-payroll/is-there-a-way-to-set-time-zone-for-the-quick-books-online/00/208837

Hi there, 

Running your small business with QuickBooks Online makes your accounting duties a breeze! I know how vital it is to ensure your QBO account is configured with the proper settings. I'd be happy to explain why you're seeing a different time-zone in QBO as opposed to your local time settings on your computer. 

The time reported in your account is automatically generated based on the location of our server. I can appreciate that having the ability to change this setting would be helpful in keeping accurate records, and I'd be happy to pass your feedback on to the product development team for review. You can submit your feedback about this also, by clicking the Gear icon > Feedback. 

I hope this helps to clarify things for you moving forward. If you have any other questions or concerns, our tech support team is always here to help.

Have a great day.