Add a birthday

1. 01Open the person and choose Edit (⌘E).
2. 02Under Dates, choose Add date.
3. 03Give it a name: Birthday, Anniversary, anything you like.
4. 04Pick the day. Type it straight into the field above the calendar, for example “2 Nov 1987”, instead of paging back through the years. Don't know the year? Type just “2 Nov”.
5. 05Save with ✓ (⌘↩).

Or tell the assistant: “Marco's birthday is 2 November 1987.”