a great idea but you should make things like that bigger with ingame-events^^
Agreed, it's a fun idea that could definitely translate well to an in game event like SWG's empire day celebration or any of WoW's seasonal week long events. Maybe they'll get something prepared to celebrate the launch of Earth's first warp 5 ship (April 12, 2151) and other such notable dates like "Federation Day" if not this year perhaps for next.
I actually posted a thread about this very topic here a while ago. And it really would be cool if this was just a starting point for Seasonal Holiday Content. A simple nod on the news page, next time an event at a missle complex in Central Montanna.