One problem with you formula is that the url is enclosed between < and >, remove these characters.
Regarding your function, the arguments in masterCal.createAllDayEvent(title, location, description,date) have not being declared.
You could save a lot of time while writing your scripts / fixing them by following the recommendations of https://...
I had a similar issue. My problem was notification settings on desktop. See if this helps: Go to Windows Settings >> System >> Notifications and Actions. Under "Notifications" area make sure "Get notifications from apps and other senders" is turned ON.
For birthdays, anniversaries, and other things that you want in your Calendar that should stay on the day that you set, instead of reminders use events
The above is because reminders are intended to be used for things that should not be shown before today until they are discarded / marked as done.
Add reminders in Google Calendar
This is you, Nick... apparently you can't edit/delete your own questions - but you found the answer you just need to go into the attendees reply email (if they respond to your original invitation) and the Yes/No/Maybe buttons in your original message which they responded to will work to mark their availability! who knew eh?! Well done Nancy Drew!!
You can get an age from your "Google Calendar" using "Google Assistant" / "Google Home"... But it is NOT straight-forward.
I discovered a work-around.
Let's say you want to ask it for your child's age... It will respond saying it does not know their birth year... (Even if they're an adult)... (Even though you include their birth year in their Contact and ...
You can change the owner of the event both in the detail view (More actions -> Change owner) and in the overview (... -> Change owner). See screenshots. Afaik the new owner has to accept before anything is actually changed.
There is no way to disable this via Google, that I can see, so you have to do this programatically. It looks like there are chrome extensions out there to do this for you, check out this as an example: https://chrome.google.com/webstore/detail/skip-redirect/jaoafjdoijdconemdmodhbfpianehlon?hl=en.