To hide certain hours in Calendar
- In Google Calendar, click and select Labs.
- Scroll to Hide morning and night and click Enable.
- At the bottom of the page, click .
To adjust the hidden time range
- Open or close your hidden time ranges: Click the gray boxes at the top and bottom of your calendar grid.
- Set or edit your hidden hours: Next to your Calendar hours, drag the gray sliders to the start and end of hours you want to show.