24 Jul How to preview your Google Calendar in Gmail
If you need a quick view of your upcoming appointments, you can add a calendar preview to your Gmail window to save you from going back and forth between windows when setting an appointment in an email.
To start using Calendar preview, go to your Settings and click on the ‘Labs’ tab. Scroll down to the ‘Google Calendar Gadget’ option, and hit enable, and then Save Changes. Your page will immediatly refresh and your Calendar preview will be added to your Gmail window.