elasticsearch-js/docs/reference/api/IngestDateProcessor.md

IngestDateProcessor [interface-IngestDateProcessor]

Name	Type	Description
field	Field	The field to get the date from.
formats	string[]	An array of the expected date formats. Can be a java time pattern or one of the following formats: ISO8601, UNIX, UNIX_MS, or TAI64N.
locale	string	The locale to use when parsing the date, relevant when parsing month names or week days. Supports template snippets.
output_format	string	The format to use when writing the date to target_field. Must be a valid java time pattern.
target_field	Field	The field that will hold the parsed date.
timezone	string	The timezone to use when parsing the date. Supports template snippets.