The 15th European VLBI Network (EVN) Symposium was originaly planned for July 2020, but was canceled due to the Covid-19 pandemic. The decision has been made to hold an online EVN Mini-Symposium and Users Meeting during July 12-14, 2021. It is hoped that the full 15th EVN Symposium and EVN Users Meeting will then be hosted by University College Cork (Ireland) on behalf of the EVN Consortium Board of Directors, provisionally during July 11-15, 2022.

The EVN Symposium normally takes place every two years, and is the main forum for discussion of the latest Very Long Baseline Interferometry scientific results and technical and technological developments within the EVN member countries.

Topics to be discussed at the symposium include:

•   The innermost structure of AGNs and the origin of jets
•   Starburst galaxies
•   Stellar evolution and stellar masers
•   FRBs and pulsars
•   Astrometry
•   Space applications
•   The relationship of EVN with other VLBI facilities
•   Synergies with other wavelengths/multi-messenger astronomy
•   New VLBI developments, new technical capabilities

The online EVN mini-symposium will be shorter than usual, with six two-hour sessions over the three days, one of which will be taken up by the Users' Meeting; thus, only a limited number of talks can be presented. Some review talks will be given in the months before and after the mini-symposium, as EVN Seminars. Abstracts for proposed posters will also be accepted.

Timeline for the EVN Mini-Symposium:

•   March 25, 2021 - Registration opens
•   May 15, 2021 - Deadline for submission of abstracts
•   May 31, 2021 - Participants informed of outcome of submission of abstracts
•   July 12-14, 2021 - 15th EVN Symposium