Apple Calendar doesn't have a direct way for my software to read your events.
There is a way through a manual export of your Apple Calendar to .ics file then import into your Google Calendar account. (If you don't have a GoogleCal account, you'd first create one.) Then your GoogleCal is read by BeauCal.com.
Instructions are here.
Let me know if you hit any snags. This should work reasonably well, however if you update your Apple Calendar events you'd need to re-import into GoogleCal.