/home/swipl/lib/swipl/library/date.pl
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 parse_time(+Text, -Stamp) is semidet
 parse_time(+Text, ?Format, -Stamp) is semidet
Stamp is a timestamp created from parsing Text using the representation Format. Currently supported formats are:
rfc_1123
Used for the HTTP protocol to represent time-stamps
iso_8601
Commonly used in XML documents.
ClioPatria (version V3.1.1-40-g9d9e003)