Date of birth
Individual's full date of birth (year, month, and day). Known or imputed for 235.1 million individuals — 91.3% of Faraday's identity graph.
At a glance
- Coverage today
- 91.3%
- Typical coverage
- 89.1%
- Individuals with a value
- 235.1M
- Median
- Nov 1971
- Most values come
- from the person
- Latest collection
- Jun 1, 2026
When these dates fall
How values are spread across the records that have one. Use it to check that the attribute tells records apart: when one value holds nearly everyone, it will not separate audiences much. Each bar is a period of time, earliest on the left. The shading groups the bars into percentile bands.
Share by date
Share of individuals with a known date in each period. The middle 50% falls between Nov 1957 and Sep 1986, shaded darkest.
P10 means 10% of individuals have a date on or before this one, and P90 means 90% do. P25 and P75 bound the middle half. The median is the middle: half fall before it, half after.
Median over time
Feb 1968 → Nov 1971 across 12 collections, shaded between P25 and P75. Estimated from a 1% sample of individuals.
Coverage
How widely Faraday has this attribute, and how precise its values are. How many of your own records get a value also depends on how many of them Faraday matches. The state map shows where coverage is thin. Coverage over time shows whether it is growing or shrinking.
Coverage by state
Percentage of individuals in each state with a value.
Coverage over time
Share of individuals holding a value at each monthly snapshot. A value carries forward for one year.
How we arrive at a value
Whether a value was observed on the person themselves, carried from their address, or estimated from the people around them.
- On the person — 100%
- A named person, from a record about that person.
- From address — 0%
- Not used for this attribute — no value is inherited this way.
- From geography — 0%
- Not used for this attribute — no value is inherited this way.
Coverage, in context
Where 91.3% sits on the catalog’s own coverage range.
Higher coverage than 44% of individual-level attributes in the catalog
Freshness
Whether the values reflect today. A long gap since the latest collection means they may lag behind what is true now.
Collections
How recently this was collected, and how often a new collection arrives. Each bar is one collection, sized by how many individuals it carried. Gaps are real — collection is periodic, not continuous.
Change between collections
How much values move between collections. Income or life events should move; heavy change in something steady can mean noisy data.
of individuals changed value between the two most recent collections — 174.0× steadier than the catalog median of 16.0%.
Contribution ledger
14 ingestions1 authority contributed since Jul 2023.
| Observed | Ingested | Count | ID |
|---|---|---|---|
| 263,433,649 | 74d6c94c-8e2b-48fe-a704-50c99ad3cdde | ||
| 266,506,942 | c5492806-a892-460e-aba1-ee78ffb29c5b | ||
| 264,096,977 | 1181277b-b751-4a59-aae1-101fa3f55375 | ||
| 264,777,400 | af53c569-4fe2-4282-975b-4cbf5f85692d | ||
| 268,508,091 | 84d6a1c5-d142-4a4d-9cb3-902de4c82c30 | ||
Related attributes
Attributes whose descriptions are closest to this one.
Neighbors found Oct 2026.
Use it in the API
Send an email, phone, or address. Get Date of birth back in real time.
- Add
date_of_birthto a project. - Send an email, phone, or address to the project's append endpoint. The response carries Date of birth for the matched person.
curl -X POST 'https://api.pro.faraday.ai/v1/projects/YOUR_PROJECT_ID/append' \
-H 'Authorization: Bearer YOUR_API_KEY' \
-H 'Content-Type: application/json' \
-d '{
"email": "jane.doe@example.com"
}'→ {"attributes":{"date_of_birth":"2005-01-01 and later"}}Technical details
null in any row means the label does not apply, or is not recorded, for this attribute.
- API name
- The field to request through the API, and the key it comes back under in a payload.
- date_
of_ birth - Category
- The catalog group the attribute is filed under.
- fig/life_event
- Type · unit
- The kind of value and, where it has one, its unit of measure. Counts on this page are in individuals, whatever the unit.
- Date
- Statistical type
- How the values are meant to be read: a measured amount, one of a ranked set, one of an unordered set, or several from an unordered set. The chart's form comes from the published values; for categories without a rank prefix, this label decides whether they are listed in rank order or by size.
- interval
- Allowed values
- The full list of values, when the attribute has a fixed set.
- null
- Derivations
- How the value is produced, each with its definition.
- Declared
- — the attribute is self-reported by the person.
- Inferred
- — the attribute is determined by rules or logic.
- How values combine
- How the values from the attribute's sources become the one value delivered.
- Uses the first available of up to 2 source fields, in priority order.
- Directionality
- For ordered values, what a higher value means.
- null
- Deprecation
- True when the attribute is being retired; choose another for new work.
- false