From 27 April to 3 May many GLAM institutions will be
holding events for
the Preservation Week :
"ALA [American Library Association] encourages libraries and other
institutions to use Preservation Week to connect our communities through
events, activities, and resources that highlight what we can do,
individually and together, to preserve our personal and shared collections."
This is a kind of event that IMHO Wikisource communities should take part.
Is anyone interested? A well designed + written page on oldwikisource (or
in subdomains) can help both to promote Wikisource at Wikimedia level and
in GLAM institutions level.
We have one month left!
 - https://www.facebook.com/preservationweek/