How to request a calendar
To request a calendar go to https://calendar.google.com/calendar/render and log in with your Google Account.
Click Other Calendar and enter the person's name into the "Add Colleagues Calendar" box below it. Click on the name or email address and a pop up will appear allowing you to send a request to this person.
Once accepted you can either view in Google Calendar or using Outlook. To view in Outlook you may need to right click on the Google (g) icon in the system tray and choose Select Calendars to View and then make sure the person's calendar you wish to view is selected.