If you've already given Context access to your calendar on your phone's setting but still don't see it reflect on your Timeline, you may need to turn it on Context first. Here's how:
Open the Context app.
Go to the "Settings" tab.
Next to "Select saved calendars" choose "Select."
Your calendar(s) should be available to select in this menu. You may need to scroll to see it. You may repeat this process for each account with the calendars you would like to enable.
