google-calendarnotifications
When filling up contacts in google I normally enter the birthday as well. This information is then displayed in a Read-Only-Calendar in Google-Calendar.
So far I do not see any way to get notifications on these dates. Do you know if this is possible?
You can do this but you first need to populate the Birthday field in your contacts.
After you have done this, go to Google Calendar:
Add > Browse Interesting CalendarsMore tabContacts' birthdays and eventsSubscribeBack to CalendarIIRC, the Google Calendar doesn't provide notifications for these events.
To receive notifications you will probably have to use a Third Party Application - one of these Apps being http://contact-birthdays.appspot.com/ ( I haven't used this application I found it via a Google search)
EDIT:
Sorry I missed probably the most important part of the question - I am pretty sure you can't display the age. This feature request has been outstanding for quite some time now. There is this userscript that adds the age to the event.
Seems that you can use Google Tasks to show additional information about an event on Google Calendar like this. It's like Post-It Notes on your calendar.
Best Answer
From all I've heard & read, this isn't possible. The only way I've got around it is by copying these auto-generated events to another calendar and then adding a notification. One advantage of this is you choose which ones you get an alert for, but of course, it's not ideal.