libdatetime-format-iso8601-perl binary package in Ubuntu Mantic amd64

 DateTime::Format::ISO8601 is a Perl DateTime extension that parses almost all
 ISO8601 date and time formats. The signature feature of ISO 8601 date/time
 representations is the ordering of date and time values from the most to the
 least significant or, in plain terms, from the largest (the year) to the
 smallest (the second).
 .
  Example date: 2008-04-18
  Example separate date and time in UTC: 2008-04-18 08:47Z
  Example combined date and time in UTC: 2008-04-18T08:47Z
  Example date with week number: 2008-W16-5
 .
 ISO 8601 time intervals will be supported in a later release.

Source package