HM2020 postponed to June 2021

In the face of the ongoing worldwide pandemia HM2020 is postponed again to June 9-12, 2021. See also http://www.hm2020.hu.

(posted about 1 month ago, :auto_ids => false)

* See FAQ/Glossary (http://yhrd.org/pages/faq) for further explanations of abbreviated terms used here