Man pages for parsedate
Recognize and Parse Dates in Various Formats, Including All ISO 8601 Formats

format_iso_8601Format date and time according to ISO 8601
parse_dateParse date from any format
parsedate-packageParse date from any format, including ISO 8601
parse_iso_8601Parse date from an ISO 8601 format
parsedate documentation built on May 8, 2019, 5:02 p.m.