# Date of birth

Individual's full date of birth (year, month, and day).

- API name: `date_of_birth`
- Category: Life event
- Type · unit: Date
- Individuals with a value: 235.1M (91.3%)
- Latest collection: Jun 1, 2026, refreshed every two months
- How values combine: Uses the first available of up to 2 source fields, in priority order.
- Middle 50% of values: Nov 1957 to Sep 1986
- Derivations:
  - Declared — the attribute is self-reported by the person.
  - Inferred — the attribute is determined by rules or logic.

## Links

- [Catalog page](/catalog/v2/date_of_birth)
- [Published statistics (JSON)](https://static.faraday.ai/figv2/date_of_birth.json)
- [API reference](/docs/reference/getattribute)