Making a calendar public can be useful occasionally. Here is how:
1. Click the Mail Drop-down menu in the top left corner, select Calendar from the menu. The Calendar will open to the monthly view by default. The are several view types.
2. On the left, Under my Calendars click the More Options 
icon of the calendar you wish to share.
3. Select Setting.
4. Then place a checkmark 
next to the option "Make available to Public."
5. Click on Get Sharable Link.
6. Click copy to copy the link
7. Click Save.
Note: You can give out the link to people who you wish to view your Calendar.