By default, Digest Builder will look at your timezone and render dates / times accordingly. If your executive is in a different timezone, follow the below steps to display times in their timezone.
Click the avatar / drop down menu in the upper right hand corner.
Select Workspace Settings and ensure you're in the correct workspace.
Click the Digest Tab.
Set Default Event Time Display to the appropriate timezone for your executive.
Note: This change will only impact new digests going forward, not existing ones.