Man pages matching name datetime::timezone::offsetonly in section 3pm:

DateTime::TimeZone::OffsetOnly.3pm.en	debian 10 / libdatetime-timezone-perl
DateTime::TimeZone::OffsetOnly.3pm.en	debian 11 / libdatetime-timezone-perl
DateTime::TimeZone::OffsetOnly.3pm.en	debian 12 / libdatetime-timezone-perl