In the Star Trek universe, the 5th of April is a very important day.
In 2163 the 5th of April saw the first time a Human Being travelled faster than the speed of light. And subsequently official First Contact with an advanced alien race, our distant cousins, the Vulcans.
That event led, eventually, to the formation of the United Federation of Planets: an institution dedicated to preserving and protecting diversity.
Today we, as Trekkies, celebrate the optimism of Gene Roddenberry's vision of humanity's future... A future in which humanity sets aside its differences and becomes a major player in a much larger community.