Click the Profile icon in the navigation bar to go to your personal profile. There are multiple sections for availability:
My Availability
This is the general time range when you’re available to schedule meetings. Don’t worry about timezones! It automatically adjusts to your local time. To set it:
Under My Availability Select the time you become available from the Online at dropdown menu.
Select the time you become unavailable from the Offline at dropdown menu.
Click Save at the bottom of your profile.