Final answer:
The appropriate data type for the column 'Day of marriage' is DATE, as it accurately stores dates in a standardized format and simplifies date-related operations in databases.
Step-by-step explanation:
For the column Day of marriage, which appears to represent a specific date, the appropriate data type to use in most database management systems would be DATE. This data type is specifically designed to store dates in a YYYY-MM-DD format. It ensures that the date is stored correctly and allows for easy date arithmetic and comparison. For instance, in SQL-based databases like MySQL, the DATE data type can be used to store, retrieve, and manipulate dates without having to worry about date format conversions.