International Meetings of Scientific Societies

Society of Crystallographers from Australia and New Zealand (Apr, most recently in Dec)
EPDIC (varies, most recently mid June to early July)
European Conference on Neutron Scattering (mid Jul, occasionally in late Aug)
Meeting of the International Mineralogical Association (Aug/Sep, even years)
International Conference on Biology & Synchrotron Radiation (Aug, triennial 2019)
ICOTOM – International Conference on the Texture of Materials
IUCr Congress (late Aug, triennial 2020)
European Crystallographic Meeting (late Aug, skipped in IUCr years)
Latin American Crystallographic Association Meeting (Nov)
Asian Crystallographic Meeting (Dec)