Starting this discussion well in advance so that we have plenty of time to figure out what we want to do.
Looking back five years: https://lists.centos.org/pipermail/centos-promo/2014-July/001382.html
I'm hoping to do many of the same things that were suggested last time, including:
* Birthday cakes at each Dojo event in 2019, starting at FOSDEM. (I'm investigating adding this to our lunch at the Brussels Dojo.)
* Commemorative sports jersey in the style of the one in the above email thread.
* Retrospective blog series, including thoughts from the project founders, statistics over the years, and stories from users about how their use of CentOS has evolved over the last 15 years.
* Possibly a refresh of our web site design (including a consistent theme across wiki, forums, blog), incorporating a "15 years" message of some kind.
If you'd like to help with this effort, or have other suggestions, please speak up. The actual date of the birthday is 14 May 2019, but I think we want to make it a year-long celebration, rather than a single day event.