-  1. Open Google Calendar in your browser 
-  2. Click the settings gear icon next to your calendar 
-  3. Select "Settings and sharing" 
-  4. Scroll down to "Access permissions" section 
-  5. Copy the "Public URL to this calendar" link 
-  6. Paste the link in the "Calendar link" field 
Example:https://calendar.google.com/calendar/embed?src=example@gmail.com