# Dates with unknown date parts

If a date field allows unknown (UNK) values for a complete date, the InForm application stores the following date values:

- For a complete date:
  - A date/time column.
  - A date string column.
  - A month column.
  - A day column.
  - A year column.
- If there is at least one unknown value, the InForm application stores the date values in a date string column only.

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