For example, an age is a value that changes over time and can be calculated from a specific date — the birth or creation date.

Photographs and letters are also helpful; knowing specific dates like the birth of a sibling or a move to a different house can help place fragmentary memories in time.

Such a component could have 3 specific attributes (for first name, last name, and date of birth) and 3 input fields, laid out in a grid.