5. How to Learn More About Your Contacts
If you generally don't have anything scheduled at 3 a.m. (except for sleep, hopefully), the "Hide morning and night" feature lets you customize your calendar so you see only events within the time range of your choice.Google+ posts your contact has made visible to you, which you can +1 directly in Gmail; recent emails your contact has sent you; Google Calendar events if your contact's Calendar is shared with you; and Google docs, shared with both you and the contact.
To disable the people widget, click the gear icon in the upper right and select "Settings." On the "General" tab, select "Hide the people widget" button. Then click "Save Changes" at the bottom of the page.