Mike Zupanc writes:

There is an "official event" planned for the 55 years of hang
gliding.

There was a significant event featuring John Dickensen, in Grafton, for the 50th
anniversary, so this one is (presumably) to finish off the accolades. The
invitation flyer below.

https://www.fai.org/sites/default/files/civl/documents/55th_anniversary_program.pdf