Template:Date/doc

Used to format date.

Usage
Year. 4-digit format is recommended.
 * Unamed Parameter 1

Month. 1 to 12, with or without leading zero.
 * Unamed Parameter 2

Day. 1 to 31, with or without leading zero.
 * Unamed Parameter 3 (optional)

If specified, it will override unnamed parameters, and used as date string for. See here for details.
 * date (optional)

Language code, the default is
 * lang (optional)

Used to specify whether to output year-month-day or year-month. By deafult, it will be auto-detection for unamed parameters, and year-month-day for
 * day=no/yes (optional)