Details are up on the facebook page for some online workshops that are taking
place in March from 14th to 20th March.

All are online so you can watch from home.

https://www.facebook.com/qualatexonline/?pnref=story

Is this an official convention?

It all seems to be pointing to www.balloondesignbrasil.com.br

Yes it's official, Pioneer are 100 years old this year and are having
days all over the world.