libdatetime-format-xsd-perl 0.2-1.1 (amd64 binary) in ubuntu hirsute

 XML Schema defines a usage profile which is a subset of the ISO8601
 profile. This profile defines that the following is the only possible
 representation for a dateTime, despite all other options ISO provides.
 .
  YYYY-MM-DD"T"HH:MI:SS(Z|[+-]zh:zm)
 .
 DateTime::Format::XSD is a subclass of DateTime::Format::ISO8601,
 therefore it will be able to parse all other ISO options, but will only
 format it in this exact spec.