A date specifies a combination of year, month and day. DuckDB follows the SQL standard’s lead by counting dates exclusively in the Gregorian calendar, even for years before that calendar was in use. Dates can be created using the DATE keyword, where the data must be formatted according to the ISO 8601 format (YYYY-MM-DD).

-- 20 September, 1992
SELECT DATE '1992-09-20';

Special Values

There are also three special date values that can be used on input:

The values infinity and -infinity are specially represented inside the system and will be displayed unchanged; but epoch is simply a notational shorthand that will be converted to the date value when read.

SELECT '-infinity'::DATE, 'epoch'::DATE, 'infinity'::DATE;

Functions

See Date Functions.