I have my default timezone set for my account, and set all my client organizations to inherit this timezone. It appears that the Staff (Default) group under Learners does not take this setting, and defaults the Default Learner Timezone to New York (GMT/UTC -4:00). This is pretty annoying to have to manually set on the default group in every org I create in my account, after already specifying a different time zone at the account and org level.