# New adult to file change date

Indicates the most recent date an individual was classified as a new adult or new young adult in the data file. Only the year and month are populated; the day is always recorded as the 1st.

- API name: `new_adult_to_file_change_date`
- Category: Life event
- Type · unit: Date
- Individuals with a value: 50.3M (19.5%)
- Latest collection: Jun 1, 2026, refreshed every two months
- How values combine: The highest of up to 2 source fields.
- Middle 50% of values: Feb 2011 to Jan 2024
- Derivations:
  - Observed — the attribute is directly observed.

## Links

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