dateonly is a calendar day with no time and no zone (a SQL date column), as distinct from
date, which is an instant. The driver delivers a calendar day as UTC midnight, so it is written
by its UTC day: YYYY-MM-DD in CSV and JSON (ISO 8601), and a real date cell in Excel.
Column data type hint for formatting.
dateonlyis a calendar day with no time and no zone (a SQLdatecolumn), as distinct fromdate, which is an instant. The driver delivers a calendar day as UTC midnight, so it is written by its UTC day:YYYY-MM-DDin CSV and JSON (ISO 8601), and a real date cell in Excel.