David I of Embarcadero is inviting everyone to celebrate Dellphi's 17th birtday on... Valentine Day, February the 14th:

Delphi v1.0 was launched at the Software Development Conference on February 14, 1995. Several thousand developers gave the team a standing ovation during the launch. 

I was there... and I'm certainly going to join the webinar (likely the first time slot) and celebrate. Will also blog, stay tuned.